ObjC: RTCVideoSource cleanup

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoSource.h

Index: webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoSource.h
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoSource.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoSource.h
index b5be132bcbd94d22a5792702804c2f4a66d2febb..a9ebc06c88e0d99dfa71297b99fde3b2514aa5b5 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoSource.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoSource.h
@@ -18,13 +18,10 @@ NS_ASSUME_NONNULL_BEGIN
 
 RTC_EXPORT
 
-@interface RTCVideoSource : RTCMediaSource<RTCVideoCapturerDelegate>
+@interface RTCVideoSource : RTCMediaSource <RTCVideoCapturerDelegate>
 
 - (instancetype)init NS_UNAVAILABLE;
 
-// RTCVideoCapturerDelegate protocol implementation.
-- (void)capturer:(RTCVideoCapturer*)capturer didCaptureVideoFrame:(RTCVideoFrame*)frame;
-
 /**
  * Calling this function will cause frames to be scaled down to the
  * requested resolution. Also, frames will be cropped to match the