Delete class DirectoryIterator and FileRotatingStream read support.

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFileLogger.h

 /*
  *  Copyright 2015 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 49 matching lines @@
                    rotationType:(RTCFileLoggerRotationType)rotationType
     NS_DESIGNATED_INITIALIZER;
 
 // Starts writing WebRTC logs to disk if not already started. Overwrites any
 // existing file(s).
 - (void)start;
 
 // Stops writing WebRTC logs to disk. This method is also called on dealloc.
 - (void)stop;
 
+#if 0
 // Returns the current contents of the logs, or nil if start has been called
 // without a stop.
 - (NSData *)logData;
+#endif
 
 @end
 
 NS_ASSUME_NONNULL_END
-