Revert of Injectable Obj-C video codecs

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

Index: webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h
index 4467b06c9da3db32624301e949470eee229b974d..78eee5f224c2bf54247cb0f502c0983dea94656f 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h
@@ -51,9 +51,6 @@
 /** Timestamp in nanoseconds. */
 @property(nonatomic, readonly) int64_t timeStampNs;
 
-/** Timestamp 90 kHz. */
-@property(nonatomic, assign) int32_t timeStamp;
-
 /** The native handle should be a pixel buffer on iOS. */
 @property(nonatomic, readonly)
     CVPixelBufferRef nativeHandle DEPRECATED_MSG_ATTRIBUTE("use buffer instead");