Revert "Support writing to this.refs from userspace" (#28877)

Reverts #28867

It broke some tests, reverting until we figure out why to avoid having
too much delay in the sync.

DiffTrain build for commit f5ce642.

Author: kassens

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-dev.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<1af14f0d0942bd1e022dac734e776b15>>
+ * @generated SignedSource<<f80067582f8d263400103116af004cc1>>
  */
 
 "use strict";
@@ -12589,6 +12589,7 @@ if (__DEV__) {
       var instance = workInProgress.stateNode;
       instance.props = newProps;
       instance.state = workInProgress.memoizedState;
+      instance.refs = {};
       initializeUpdateQueue(workInProgress);
       var contextType = ctor.contextType;
 
@@ -26672,7 +26673,7 @@ if (__DEV__) {
       return root;
     }
 
-    var ReactVersion = "19.0.0-canary-4a670971";
+    var ReactVersion = "19.0.0-canary-a47ffde4";
 
     /*
      * The `'' + value` pattern (used in perf-sensitive code) throws for Symbol

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-prod.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<c7247ab9f63052e5a0750fdb7aaf6996>>
+ * @generated SignedSource<<f3eb1768c908f25292e8f079ec672f53>>
  */
 
 "use strict";
@@ -3426,6 +3426,7 @@ function mountClassInstance(workInProgress, ctor, newProps, renderLanes) {
   var instance = workInProgress.stateNode;
   instance.props = newProps;
   instance.state = workInProgress.memoizedState;
+  instance.refs = {};
   initializeUpdateQueue(workInProgress);
   var contextType = ctor.contextType;
   "object" === typeof contextType && null !== contextType
@@ -9143,7 +9144,7 @@ var devToolsConfig$jscomp$inline_1019 = {
     throw Error("TestRenderer does not support findFiberByHostInstance()");
   },
   bundleType: 0,
-  version: "19.0.0-canary-3c5c4140",
+  version: "19.0.0-canary-7a48fce4",
   rendererPackageName: "react-test-renderer"
 };
 var internals$jscomp$inline_1238 = {
@@ -9174,7 +9175,7 @@ var internals$jscomp$inline_1238 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "19.0.0-canary-3c5c4140"
+  reconcilerVersion: "19.0.0-canary-7a48fce4"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
   var hook$jscomp$inline_1239 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-profiling.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<2efa00521669a237ba088981baf581b8>>
+ * @generated SignedSource<<9206ca0f6781a4c840d6d393f26b3429>>
  */
 
 "use strict";
@@ -3584,6 +3584,7 @@ function mountClassInstance(workInProgress, ctor, newProps, renderLanes) {
   var instance = workInProgress.stateNode;
   instance.props = newProps;
   instance.state = workInProgress.memoizedState;
+  instance.refs = {};
   initializeUpdateQueue(workInProgress);
   var contextType = ctor.contextType;
   "object" === typeof contextType && null !== contextType
@@ -9759,7 +9760,7 @@ var devToolsConfig$jscomp$inline_1101 = {
     throw Error("TestRenderer does not support findFiberByHostInstance()");
   },
   bundleType: 0,
-  version: "19.0.0-canary-dec118c3",
+  version: "19.0.0-canary-39a6938a",
   rendererPackageName: "react-test-renderer"
 };
 (function (internals) {
@@ -9803,7 +9804,7 @@ var devToolsConfig$jscomp$inline_1101 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "19.0.0-canary-dec118c3"
+  reconcilerVersion: "19.0.0-canary-39a6938a"
 });
 exports._Scheduler = Scheduler;
 exports.act = act;

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-dev.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<df40c362ab4858d0f1f3b69d7d7eb4ad>>
+ * @generated SignedSource<<150980e4b77b12c241c9997159b4f67a>>
  */
 
 "use strict";
@@ -26,7 +26,7 @@ if (__DEV__) {
     }
     var dynamicFlagsUntyped = require("ReactNativeInternalFeatureFlags");
 
-    var ReactVersion = "19.0.0-canary-d59b7713";
+    var ReactVersion = "19.0.0-canary-a13a0c2f";
 
     // ATTENTION
     // When adding new symbols to this file,
@@ -299,14 +299,20 @@ if (__DEV__) {
 
     var assign = Object.assign;
 
+    var emptyObject = {};
+
+    {
+      Object.freeze(emptyObject);
+    }
     /**
      * Base class helpers for the updating state of a component.
      */
 
     function Component(props, context, updater) {
       this.props = props;
-      this.context = context;
-      this.refs = {}; // We initialize the default updater but the real one gets injected by the
+      this.context = context; // If a component has string refs, we will assign a different object later.
+
+      this.refs = emptyObject; // We initialize the default updater but the real one gets injected by the
       // renderer.
 
       this.updater = updater || ReactNoopUpdateQueue;
@@ -423,7 +429,7 @@ if (__DEV__) {
       this.props = props;
       this.context = context; // If a component has string refs, we will assign a different object later.
 
-      this.refs = {};
+      this.refs = emptyObject;
       this.updater = updater || ReactNoopUpdateQueue;
     }
 

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-prod.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<4623f2323ff9fe23a59f41063e37036d>>
+ * @generated SignedSource<<00252b7815c38ef0d757b44717a43f7d>>
  */
 
 "use strict";
@@ -46,11 +46,12 @@ var ReactNoopUpdateQueue = {
     enqueueReplaceState: function () {},
     enqueueSetState: function () {}
   },
-  assign = Object.assign;
+  assign = Object.assign,
+  emptyObject = {};
 function Component(props, context, updater) {
   this.props = props;
   this.context = context;
-  this.refs = {};
+  this.refs = emptyObject;
   this.updater = updater || ReactNoopUpdateQueue;
 }
 Component.prototype.isReactComponent = {};
@@ -73,7 +74,7 @@ ComponentDummy.prototype = Component.prototype;
 function PureComponent(props, context, updater) {
   this.props = props;
   this.context = context;
-  this.refs = {};
+  this.refs = emptyObject;
   this.updater = updater || ReactNoopUpdateQueue;
 }
 var pureComponentPrototype = (PureComponent.prototype = new ComponentDummy());
@@ -678,4 +679,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.0.0-canary-43e619b6";
+exports.version = "19.0.0-canary-3277b133";

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-profiling.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<6bf80ec383f6cf4c2e8d203cf6a830b0>>
+ * @generated SignedSource<<9fd3393509037fbe670735ccea6d8cca>>
  */
 
 "use strict";
@@ -50,11 +50,12 @@ var ReactNoopUpdateQueue = {
     enqueueReplaceState: function () {},
     enqueueSetState: function () {}
   },
-  assign = Object.assign;
+  assign = Object.assign,
+  emptyObject = {};
 function Component(props, context, updater) {
   this.props = props;
   this.context = context;
-  this.refs = {};
+  this.refs = emptyObject;
   this.updater = updater || ReactNoopUpdateQueue;
 }
 Component.prototype.isReactComponent = {};
@@ -77,7 +78,7 @@ ComponentDummy.prototype = Component.prototype;
 function PureComponent(props, context, updater) {
   this.props = props;
   this.context = context;
-  this.refs = {};
+  this.refs = emptyObject;
   this.updater = updater || ReactNoopUpdateQueue;
 }
 var pureComponentPrototype = (PureComponent.prototype = new ComponentDummy());
@@ -682,7 +683,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.0.0-canary-c3e8564d";
+exports.version = "19.0.0-canary-52747c26";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/REVISION

@@ -1 +1 @@
-ea24427d16f3ac9b0f3bb45cdc7919ac208130c9
+f5ce642deed7c74c5ae5df54ec4340a8d028eac9

compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/implementations/ReactFabric-dev.fb.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<69452b089b0732ebffeaf4ae565a8ac2>>
+ * @generated SignedSource<<84d884f07a1d5851f53652012b257860>>
  */
 
 "use strict";
@@ -16131,6 +16131,7 @@ to return true:wantsResponderID|                            |
       var instance = workInProgress.stateNode;
       instance.props = newProps;
       instance.state = workInProgress.memoizedState;
+      instance.refs = {};
       initializeUpdateQueue(workInProgress);
       var contextType = ctor.contextType;
 
@@ -30295,7 +30296,7 @@ to return true:wantsResponderID|                            |
       return root;
     }
 
-    var ReactVersion = "19.0.0-canary-385c1224";
+    var ReactVersion = "19.0.0-canary-adfb7d73";
 
     /*
      * The `'' + value` pattern (used in perf-sensitive code) throws for Symbol

compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/implementations/ReactFabric-prod.fb.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<13b0be8da9b49fcd1f29069f699207ea>>
+ * @generated SignedSource<<d42756695dd6c4c7a24ede54b6a5902a>>
  */
 
 "use strict";
@@ -4995,6 +4995,7 @@ function mountClassInstance(workInProgress, ctor, newProps, renderLanes) {
   var instance = workInProgress.stateNode;
   instance.props = newProps;
   instance.state = workInProgress.memoizedState;
+  instance.refs = {};
   initializeUpdateQueue(workInProgress);
   var contextType = ctor.contextType;
   "object" === typeof contextType && null !== contextType
@@ -10601,7 +10602,7 @@ var roots = new Map(),
   devToolsConfig$jscomp$inline_1099 = {
     findFiberByHostInstance: getInstanceFromNode,
     bundleType: 0,
-    version: "19.0.0-canary-7feb98a8",
+    version: "19.0.0-canary-7f7baf16",
     rendererPackageName: "react-native-renderer",
     rendererConfig: {
       getInspectorDataForInstance: getInspectorDataForInstance,
@@ -10644,7 +10645,7 @@ var internals$jscomp$inline_1366 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "19.0.0-canary-7feb98a8"
+  reconcilerVersion: "19.0.0-canary-7f7baf16"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
   var hook$jscomp$inline_1367 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<dd792dd5b38efe98d74676e597f14301>>
+ * @generated SignedSource<<64acec7be24561ecbf6d2eaf55e55d0a>>
  */
 
 "use strict";
@@ -5187,6 +5187,7 @@ function mountClassInstance(workInProgress, ctor, newProps, renderLanes) {
   var instance = workInProgress.stateNode;
   instance.props = newProps;
   instance.state = workInProgress.memoizedState;
+  instance.refs = {};
   initializeUpdateQueue(workInProgress);
   var contextType = ctor.contextType;
   "object" === typeof contextType && null !== contextType
@@ -11306,7 +11307,7 @@ var roots = new Map(),
   devToolsConfig$jscomp$inline_1179 = {
     findFiberByHostInstance: getInstanceFromNode,
     bundleType: 0,
-    version: "19.0.0-canary-e320aa3b",
+    version: "19.0.0-canary-ef6bcf29",
     rendererPackageName: "react-native-renderer",
     rendererConfig: {
       getInspectorDataForInstance: getInspectorDataForInstance,
@@ -11362,7 +11363,7 @@ var roots = new Map(),
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "19.0.0-canary-e320aa3b"
+  reconcilerVersion: "19.0.0-canary-ef6bcf29"
 });
 exports.createPortal = function (children, containerTag) {
   return createPortal$1(