Remove remains of webrtc/base

webrtc/base/gtest_prod_util.h

Index: webrtc/base/gtest_prod_util.h
diff --git a/webrtc/base/gtest_prod_util.h b/webrtc/base/gtest_prod_util.h
deleted file mode 100644
index 0c25943f2c557e5795a373fc7f513c12291ad6f8..0000000000000000000000000000000000000000
--- a/webrtc/base/gtest_prod_util.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- *  Copyright (c) 2012 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.
- */
-
-#ifndef WEBRTC_BASE_GTEST_PROD_UTIL_H_
-#define WEBRTC_BASE_GTEST_PROD_UTIL_H_
-
-
-// This header is deprecated and is just left here temporarily during
-// refactoring. See https://bugs.webrtc.org/7634 for more details.
-#include "webrtc/rtc_base/gtest_prod_util.h"
-
-#endif  // WEBRTC_BASE_GTEST_PROD_UTIL_H_