remove including RTCPixelBufferRenderer.h for WebRTC.h.

Author: cloudwebrtc

ios/WebRTC.framework/Headers/WebRTC.h

@@ -27,7 +27,6 @@
 #if TARGET_OS_IPHONE
 #import <WebRTC/RTCEAGLVideoView.h>
 #import <WebRTC/RTCMTLVideoView.h>
-#import <WebRTC/RTCPixelBufferRenderer.h>
 #import <WebRTC/RTCVideoViewShading.h>
 #endif
 #import <WebRTC/RTCFieldTrials.h>