Delete unused file sessionid.h.

webrtc/p2p/base/sessionid.h

Index: webrtc/p2p/base/sessionid.h
diff --git a/webrtc/p2p/base/sessionid.h b/webrtc/p2p/base/sessionid.h
deleted file mode 100644
index f69570039b4da7156a19e69960509dfec40cd844..0000000000000000000000000000000000000000
--- a/webrtc/p2p/base/sessionid.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *  Copyright 2004 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_P2P_BASE_SESSIONID_H_
-#define WEBRTC_P2P_BASE_SESSIONID_H_
-
-// TODO: Remove this file.
-
-namespace cricket {
-
-}  // namespace cricket
-
-#endif  // WEBRTC_P2P_BASE_SESSIONID_H_