Remove getJavaScriptContextHolder() from BridgelessReactContext (#44124)

Summary:
Pull Request resolved: #44124

This API was introduced as part of Backwards Compat effort recently but now this backwards comptability is supported through BridgelessCatalystInstance. The major OSS usages are through Catalyst Instance and not through Bridgeless React Context which is why deleting this makes sense so that people do not start depending on this.

Changelog:
[Android][Removed] - Remove getJavaScriptContextHolder() from BridgelessReactContext since now it can be accessed through BridgelessCatalystInstance in Bridgeless mode

Reviewed By: RSNara

Differential Revision: D56205699

fbshipit-source-id: 175463e17c526359c2e04fec4b2104aea3949d5d

Author: arushikesarwani94

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/BridgelessReactContext.java

@@ -13,16 +13,13 @@
 import com.facebook.react.bridge.Arguments;
 import com.facebook.react.bridge.Callback;
 import com.facebook.react.bridge.CatalystInstance;
-import com.facebook.react.bridge.JavaScriptContextHolder;
 import com.facebook.react.bridge.JavaScriptModule;
 import com.facebook.react.bridge.JavaScriptModuleRegistry;
 import com.facebook.react.bridge.NativeArray;
 import com.facebook.react.bridge.NativeModule;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.UIManager;
 import com.facebook.react.bridge.WritableNativeArray;
-import com.facebook.react.common.annotations.FrameworkAPI;
-import com.facebook.react.common.annotations.UnstableReactNativeAPI;
 import com.facebook.react.config.ReactFeatureFlags;
 import com.facebook.react.devsupport.interfaces.DevSupportManager;
 import com.facebook.react.modules.core.DefaultHardwareBackBtnHandler;
@@ -157,13 +154,6 @@ public Collection<NativeModule> getNativeModules() {
     return mReactHost.getNativeModule(nativeModuleInterface);
   }
 
-  @Override
-  @FrameworkAPI
-  @UnstableReactNativeAPI
-  public @Nullable JavaScriptContextHolder getJavaScriptContextHolder() {
-    return mReactHost.getJavaScriptContextHolder();
-  }
-
   @Override
   public void handleException(Exception e) {
     mReactHost.handleHostException(e);