Move RTCVideoSource to webrtc/api/objc.

webrtc/api/objc/RTCMediaSource.h

Index: webrtc/api/objc/RTCMediaSource.h
diff --git a/webrtc/api/objc/RTCMediaSource.h b/webrtc/api/objc/RTCMediaSource.h
deleted file mode 100644
index 0b36b8d7093543c803f6097d28488efef8678306..0000000000000000000000000000000000000000
--- a/webrtc/api/objc/RTCMediaSource.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- *  Copyright 2015 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>
-
-typedef NS_ENUM(NSInteger, RTCSourceState) {
-  RTCSourceStateInitializing,
-  RTCSourceStateLive,
-  RTCSourceStateEnded,
-  RTCSourceStateMuted,
-};
-
-NS_ASSUME_NONNULL_BEGIN
-
-@interface RTCMediaSource : NSObject
-
-/** The current state of the RTCMediaSource. */
-@property(nonatomic, readonly) RTCSourceState state;
-
-- (instancetype)init NS_UNAVAILABLE;
-
-@end
-
-NS_ASSUME_NONNULL_END