Delete never-posted RCTBridge notifications

Summary:
Five bridge notifications and three user-info keys have zero posters; only fast refresh is posted and observed. Delete the script-download notifications, `WillBeInvalidated`, and the keys with the dead observers in `RCTDeviceInfo`, the avatar updates module, and both reload perf loggers. Keep the two invalidation notifications Skia and Reanimated still observe, marked deprecated along with `WillReload`.

Changelog:
[iOS][Removed] - Remove never-posted `RCTBridge` script-download and `WillBeInvalidated` notifications
[iOS][Deprecated] - Deprecate never-posted invalidation notifications still observed by Skia and Reanimated

Reviewed By: vzaidman

Differential Revision: D127294776

Author: christophpurrer

packages/react-native/React/Base/RCTBridgeConstants.h

@@ -15,57 +15,22 @@
  * DEPRECATED - Use RCTReloadCommand instead. This notification fires just before the bridge starts
  * processing a request to reload.
  */
-RCT_EXTERN NSString *const RCTBridgeWillReloadNotification;
+RCT_EXTERN NSString *const RCTBridgeWillReloadNotification __deprecated_msg("Use RCTReloadCommand instead.");
 
 /**
  * This notification fires whenever a fast refresh happens.
  */
 RCT_EXTERN NSString *const RCTBridgeFastRefreshNotification;
 
-/**
- * This notification fires just before the bridge begins downloading a script
- * from the packager.
- */
-RCT_EXTERN NSString *const RCTBridgeWillDownloadScriptNotification;
-
-/**
- * This notification fires just after the bridge finishes downloading a script
- * from the packager.
- */
-RCT_EXTERN NSString *const RCTBridgeDidDownloadScriptNotification;
-
 /**
  * This notification fires right after the bridge is about to invalidate NativeModule
  * instances during teardown. Handle this notification to perform additional invalidation.
  */
-RCT_EXTERN NSString *const RCTBridgeWillInvalidateModulesNotification;
+RCT_EXTERN NSString *const RCTBridgeWillInvalidateModulesNotification
+    __deprecated_msg("Never posted; will be removed.");
 
 /**
  * This notification fires right after the bridge finishes invalidating NativeModule
  * instances during teardown. Handle this notification to perform additional invalidation.
  */
-RCT_EXTERN NSString *const RCTBridgeDidInvalidateModulesNotification;
-
-/**
- * This notification fires right before the bridge starting invalidation process.
- * Handle this notification to perform additional invalidation.
- * The notification can be issued on any thread.
- */
-RCT_EXTERN NSString *const RCTBridgeWillBeInvalidatedNotification;
-
-/**
- * Key for the RCTSource object in the RCTBridgeDidDownloadScriptNotification
- * userInfo dictionary.
- */
-RCT_EXTERN NSString *const RCTBridgeDidDownloadScriptNotificationSourceKey;
-
-/**
- * Key for the reload reason in the RCTBridgeWillReloadNotification userInfo dictionary.
- */
-RCT_EXTERN NSString *const RCTBridgeDidDownloadScriptNotificationReasonKey;
-
-/**
- * Key for the bridge description (NSString_ in the
- * RCTBridgeDidDownloadScriptNotification userInfo dictionary.
- */
-RCT_EXTERN NSString *const RCTBridgeDidDownloadScriptNotificationBridgeDescriptionKey;
+RCT_EXTERN NSString *const RCTBridgeDidInvalidateModulesNotification __deprecated_msg("Never posted; will be removed.");

packages/react-native/React/Base/RCTBridgeConstants.m

@@ -9,10 +9,5 @@
 
 NSString *const RCTBridgeWillReloadNotification = @"RCTBridgeWillReloadNotification";
 NSString *const RCTBridgeFastRefreshNotification = @"RCTBridgeFastRefreshNotification";
-NSString *const RCTBridgeWillDownloadScriptNotification = @"RCTBridgeWillDownloadScriptNotification";
-NSString *const RCTBridgeDidDownloadScriptNotification = @"RCTBridgeDidDownloadScriptNotification";
 NSString *const RCTBridgeWillInvalidateModulesNotification = @"RCTBridgeWillInvalidateModulesNotification";
 NSString *const RCTBridgeDidInvalidateModulesNotification = @"RCTBridgeDidInvalidateModulesNotification";
-NSString *const RCTBridgeWillBeInvalidatedNotification = @"RCTBridgeWillBeInvalidatedNotification";
-NSString *const RCTBridgeDidDownloadScriptNotificationSourceKey = @"source";
-NSString *const RCTBridgeDidDownloadScriptNotificationBridgeDescriptionKey = @"bridgeDescription";

packages/react-native/React/CoreModules/RCTDeviceInfo.mm

@@ -116,16 +116,6 @@ - (void)initialize
                                              object:nil];
 #endif
 
-  // TODO T175901725 - Registering the RCTDeviceInfo module to the notification is a short-term fix to unblock 0.73
-  // The actual behavior should be that the module is properly registered in the TurboModule/Bridge infrastructure
-  // and the infrastructure imperatively invoke the `invalidate` method, rather than listening to a notification.
-  // This is a temporary workaround until we can investigate the issue better as there might be other modules in a
-  // similar situation.
-  [[NSNotificationCenter defaultCenter] addObserver:self
-                                           selector:@selector(invalidate)
-                                               name:RCTBridgeWillInvalidateModulesNotification
-                                             object:nil];
-
   [self invalidateCachedConstants];
 }
 
@@ -160,8 +150,6 @@ - (void)_cleanupObservers
 
   [[NSNotificationCenter defaultCenter] removeObserver:self name:RCTUserInterfaceStyleDidChangeNotification object:nil];
 
-  [[NSNotificationCenter defaultCenter] removeObserver:self name:RCTBridgeWillInvalidateModulesNotification object:nil];
-
   [_applicationWindow removeObserver:self forKeyPath:kFrameKeyPath];
 
 #if TARGET_OS_IOS