[cleanup] remove flag enableAddPropertiesFastPath (#31062)

The experiment was tested internally and rolled out, replacing the flag
with `true`.

Author: kassens

packages/react-native-renderer/src/ReactNativeAttributePayloadFabric.js

@@ -14,10 +14,7 @@ import {
 } from 'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface';
 import isArray from 'shared/isArray';
 
-import {
-  enableAddPropertiesFastPath,
-  enableShallowPropDiffing,
-} from 'shared/ReactFeatureFlags';
+import {enableShallowPropDiffing} from 'shared/ReactFeatureFlags';
 
 import type {AttributeConfiguration} from './ReactNativeTypes';
 
@@ -537,11 +534,7 @@ export function create(
   props: Object,
   validAttributes: AttributeConfiguration,
 ): null | Object {
-  if (enableAddPropertiesFastPath) {
-    return fastAddProperties(null, props, validAttributes);
-  } else {
-    return addProperties(null, props, validAttributes);
-  }
+  return fastAddProperties(null, props, validAttributes);
 }
 
 export function diff(

packages/shared/ReactFeatureFlags.js

@@ -141,8 +141,6 @@ export const enableServerComponentLogs = true;
  */
 export const enablePersistedModeClonedFlag = false;
 
-export const enableAddPropertiesFastPath = false;
-
 export const enableOwnerStacks = __EXPERIMENTAL__;
 
 export const enableShallowPropDiffing = false;

packages/shared/forks/ReactFeatureFlags.native-fb-dynamic.js

@@ -18,7 +18,6 @@
 // add a test configuration for React Native.
 
 export const alwaysThrottleRetries = __VARIANT__;
-export const enableAddPropertiesFastPath = __VARIANT__;
 export const enableObjectFiber = __VARIANT__;
 export const enableHiddenSubtreeInsertionEffectCleanup = __VARIANT__;
 export const enablePersistedModeClonedFlag = __VARIANT__;

packages/shared/forks/ReactFeatureFlags.native-fb.js

@@ -20,7 +20,6 @@ const dynamicFlags: DynamicExportsType = (dynamicFlagsUntyped: any);
 // the exports object every time a flag is read.
 export const {
   alwaysThrottleRetries,
-  enableAddPropertiesFastPath,
   enableFabricCompleteRootInCommitPhase,
   enableHiddenSubtreeInsertionEffectCleanup,
   enableObjectFiber,

packages/shared/forks/ReactFeatureFlags.native-oss.js

@@ -32,7 +32,6 @@ export const disableLegacyMode = false;
 export const disableSchedulerTimeoutInWorkLoop = false;
 export const disableStringRefs = true;
 export const disableTextareaChildren = false;
-export const enableAddPropertiesFastPath = false;
 export const enableAsyncActions = true;
 export const enableAsyncDebugInfo = false;
 export const enableAsyncIterableChildren = false;

packages/shared/forks/ReactFeatureFlags.test-renderer.js

@@ -78,7 +78,6 @@ export const disableClientCache = true;
 
 export const enableServerComponentLogs = true;
 export const enableInfiniteRenderLoopDetection = false;
-export const enableAddPropertiesFastPath = false;
 
 export const renameElementSymbol = true;
 export const enableShallowPropDiffing = false;

packages/shared/forks/ReactFeatureFlags.test-renderer.native-fb.js

@@ -24,7 +24,6 @@ export const disableLegacyMode = false;
 export const disableSchedulerTimeoutInWorkLoop = false;
 export const disableStringRefs = true;
 export const disableTextareaChildren = false;
-export const enableAddPropertiesFastPath = false;
 export const enableAsyncActions = true;
 export const enableAsyncDebugInfo = false;
 export const enableAsyncIterableChildren = false;

packages/shared/forks/ReactFeatureFlags.test-renderer.www.js

@@ -89,7 +89,6 @@ export const enableReactTestRendererWarning = false;
 export const disableLegacyMode = true;
 
 export const disableDefaultPropsExceptForClasses = false;
-export const enableAddPropertiesFastPath = false;
 
 export const renameElementSymbol = false;
 

packages/shared/forks/ReactFeatureFlags.www-dynamic.js

@@ -18,7 +18,6 @@ export const disableDefaultPropsExceptForClasses = __VARIANT__;
 export const disableLegacyContextForFunctionComponents = __VARIANT__;
 export const disableLegacyMode = __VARIANT__;
 export const disableSchedulerTimeoutInWorkLoop = __VARIANT__;
-export const enableAddPropertiesFastPath = __VARIANT__;
 export const enableDeferRootSchedulingToMicrotask = __VARIANT__;
 export const enableDO_NOT_USE_disableStrictPassiveEffect = __VARIANT__;
 export const enableHiddenSubtreeInsertionEffectCleanup = __VARIANT__;

packages/shared/forks/ReactFeatureFlags.www.js

@@ -19,7 +19,6 @@ export const {
   disableDefaultPropsExceptForClasses,
   disableLegacyContextForFunctionComponents,
   disableSchedulerTimeoutInWorkLoop,
-  enableAddPropertiesFastPath,
   enableDebugTracing,
   enableDeferRootSchedulingToMicrotask,
   enableDO_NOT_USE_disableStrictPassiveEffect,