Delete unused method FilesystemInterface::DeleteEmptyFolder.

webrtc/base/unixfilesystem.h

 /*
  *  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.
  */
 
@@ skipping 20 matching lines @@
   // TODO(fischman): add an Android version that uses JNI and drop the
   // SetApp*Folder() APIs once external users stop using them.
   static void SetAppDataFolder(const std::string& folder);
   static void SetAppTempFolder(const std::string& folder);
 #endif
 
   // This will attempt to delete the file located at filename.
   // It will fail with VERIY if you pass it a non-existant file, or a directory.
   bool DeleteFile(const Pathname& filename) override;
 
-  // This will attempt to delete the folder located at 'folder'
-  // It DCHECKs and returns false if you pass it a non-existant folder or a
-  // plain file.
-  bool DeleteEmptyFolder(const Pathname& folder) override;
-
   // Creates a directory. This will call itself recursively to create /foo/bar
   // even if /foo does not exist. All created directories are created with the
   // given mode.
   // Returns TRUE if function succeeds
   virtual bool CreateFolder(const Pathname &pathname, mode_t mode);
 
   // As above, with mode = 0755.
   bool CreateFolder(const Pathname& pathname) override;
 
   // This moves a file from old_path to new_path, where "file" can be a plain
@@ skipping 32 matching lines @@
 #else
   static char* app_temp_path_;
 #endif
 
   static char* CopyString(const std::string& str);
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_UNIXFILESYSTEM_H_