Delete VideoRendererInterface.

Use in chromium was deleted a few days ago.

BUG=webrtc:5426
R=magjed@webrtc.org, pbos@webrtc.org, perkj@webrtc.org, pthatcher@webrtc.org, tkchin@webrtc.org

Review URL: https://codereview.webrtc.org/1817473002 .

Cr-Commit-Position: refs/heads/master@{#12099}
diff --git a/webrtc/api/objc/RTCVideoRendererAdapter.h b/webrtc/api/objc/RTCVideoRendererAdapter.h
index 434a61b..b0b6f04 100644
--- a/webrtc/api/objc/RTCVideoRendererAdapter.h
+++ b/webrtc/api/objc/RTCVideoRendererAdapter.h
@@ -13,8 +13,8 @@
 NS_ASSUME_NONNULL_BEGIN
 
 /*
- * Creates a webrtc::VideoRendererInterface surface for an RTCVideoRenderer. The
- * webrtc::VideoRendererInterface is used by WebRTC rendering code - this
+ * Creates a rtc::VideoSinkInterface surface for an RTCVideoRenderer. The
+ * rtc::VideoSinkInterface is used by WebRTC rendering code - this
  * adapter adapts calls made to that interface to the RTCVideoRenderer supplied
  * during construction.
  */