Delete some unused header files.

NOTRY=True # two of the androids bots are not cooperating
BUG=

Review-Url: https://codereview.webrtc.org/2057533002
Cr-Commit-Position: refs/heads/master@{#13099}

webrtc/modules/video_coding/test/release_test.h

@@ -1,17 +0,0 @@
-/*
- *  Copyright (c) 2011 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_MODULES_VIDEO_CODING_TEST_RELEASE_TEST_H_
-#define WEBRTC_MODULES_VIDEO_CODING_TEST_RELEASE_TEST_H_
-
-int ReleaseTest();
-int ReleaseTestPart2();
-
-#endif  // WEBRTC_MODULES_VIDEO_CODING_TEST_RELEASE_TEST_H_