Rename and merge files for RCTWebSocketObserver protocol

Summary: No need to have two files; merge it into one and give it an appropriate name.

Reviewed By: javache

Differential Revision: D4296716

fbshipit-source-id: 904d13c23bb8d403b8efcb60f9a4aa5df5b08972

React/Base/RCTWebSocketObserverProtocol.h

@@ -8,15 +8,16 @@
  */
 
 #import <React/RCTDefines.h>
-#import <React/RCTWebSocketProxyDelegate.h>
 
 #if RCT_DEV // Only supported in dev mode
 
-@protocol RCTWebSocketProxyDelegate;
+@protocol RCTWebSocketObserverDelegate
+- (void)didReceiveWebSocketMessage:(NSDictionary<NSString *, id> *)message;
+@end
 
 @protocol RCTWebSocketObserver
 - (instancetype)initWithURL:(NSURL *)url;
-@property (nonatomic, weak) id<RCTWebSocketProxyDelegate> delegate;
+@property (nonatomic, weak) id<RCTWebSocketObserverDelegate> delegate;
 - (void)start;
 @end
 

React/Base/RCTWebSocketProxyDelegate.h

@@ -1,18 +0,0 @@
-/**
- * Copyright (c) 2015-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#import <React/RCTDefines.h>
-
-#if RCT_DEV // Only supported in dev mode
-
-@protocol RCTWebSocketProxyDelegate
-- (void)didReceiveWebSocketMessage:(NSDictionary<NSString *, id> *)message;
-@end
-
-#endif