Revert of Add metal view, shaders and renderer.

webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLNV12Renderer.h

Index: webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLNV12Renderer.h
diff --git a/webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLNV12Renderer.h b/webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLNV12Renderer.h
deleted file mode 100644
index 0508e78db5c6338e67b73322d7e3c89be0cde282..0000000000000000000000000000000000000000
--- a/webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLNV12Renderer.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#import <Foundation/Foundation.h>
-#import <MetalKit/MTKView.h>
-
-#import "WebRTC/RTCVideoFrame.h"
-
-/**
- * Protocol defining ability to render RTCVideoFrame in Metal enabled views.
- */
-@protocol RTCMTLRenderer <NSObject>
-
-/**
- * Method to be implemented to perform actual rendering of the provided frame.
- *
- * @param frame The frame to be rendered.
- */
-- (void)drawFrame:(RTCVideoFrame *)frame;
-@end
-
-/**
- * Implementation of RTCMTLRenderer protocol for rendering native nv12 video frames.
- */
-@interface RTCMTLNV12Renderer : NSObject <RTCMTLRenderer>
-
-/**
- * Sets the provided view as rendering destination if possible.
- *
- * If not possible method returns NO and callers of the method are responisble for performing
- * cleanups.
- */
-- (BOOL)addRenderingDestination:(__kindof MTKView *)view;
-@end