Remove auto creation of executor factory in bridge

React/CxxBridge/RCTCxxBridge.mm

@@ -39,19 +39,6 @@
 #import <jsireact/JSIExecutor.h>
 #import <reactperflogger/BridgeNativeModulePerfLogger.h>
 
-#ifndef RCT_USE_HERMES
-#if __has_include(<reacthermes/HermesExecutorFactory.h>)
-#define RCT_USE_HERMES 1
-#else
-#define RCT_USE_HERMES 0
-#endif
-#endif
-
-#if RCT_USE_HERMES
-#import <reacthermes/HermesExecutorFactory.h>
-#else
-#import "JSCExecutorFactory.h"
-#endif
 #import "RCTJSIExecutorRuntimeInstaller.h"
 
 #import "NSDataBigString.h"
@@ -472,14 +459,6 @@ - (void)start
       id<RCTCxxBridgeDelegate> cxxDelegate = (id<RCTCxxBridgeDelegate>)self.delegate;
       executorFactory = [cxxDelegate jsExecutorFactoryForBridge:self];
     }
-    if (!executorFactory) {
-      auto installBindings = RCTJSIExecutorRuntimeInstaller(nullptr);
-#if RCT_USE_HERMES
-      executorFactory = std::make_shared<HermesExecutorFactory>(installBindings);
-#else
-      executorFactory = std::make_shared<JSCExecutorFactory>(installBindings);
-#endif
-    }
   } else {
     id<RCTJavaScriptExecutor> objcExecutor = [self moduleForClass:self.executorClass];
     executorFactory.reset(new RCTObjcExecutorFactory(objcExecutor, ^(NSError *error) {