Delete unneeded includes of deprecated system_wrappers include files.

webrtc/modules/video_capture/objc/video_capture.mm

 /*
  *  Copyright (c) 2013 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.
  */
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 #include "webrtc/base/refcount.h"
 #include "webrtc/base/scoped_ref_ptr.h"
 #include "webrtc/modules/video_capture/objc/device_info_objc.h"
 #include "webrtc/modules/video_capture/objc/rtc_video_capture_objc.h"
-#include "webrtc/system_wrappers/include/trace.h"
 
 using namespace webrtc;
 using namespace videocapturemodule;
 
 rtc::scoped_refptr<VideoCaptureModule> VideoCaptureImpl::Create(
     const char* deviceUniqueIdUTF8) {
   return VideoCaptureIos::Create(deviceUniqueIdUTF8);
 }
 
 VideoCaptureIos::VideoCaptureIos()
@@ skipping 67 matching lines @@
 
 bool VideoCaptureIos::CaptureStarted() {
   return is_capturing_;
 }
 
 int32_t VideoCaptureIos::CaptureSettings(VideoCaptureCapability& settings) {
   settings = capability_;
   settings.rawType = kVideoNV12;
   return 0;
 }