Delete class DirectoryIterator and FileRotatingStream read support.

webrtc/sdk/objc/Framework/Classes/Common/RTCFileLogger.mm

 /*
  *  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 107 matching lines @@
 - (void)stop {
   if (!_hasStarted) {
     return;
   }
   RTC_DCHECK(_logSink);
   rtc::LogMessage::RemoveLogToStream(_logSink.get());
   _hasStarted = NO;
   _logSink.reset();
 }
 
+#if 0
 - (NSData *)logData {
   if (_hasStarted) {
     return nil;
   }
   NSMutableData* logData = [NSMutableData data];
   std::unique_ptr<rtc::FileRotatingStream> stream;
   switch(_rotationType) {
     case RTCFileLoggerTypeApp:
       stream.reset(
           new rtc::FileRotatingStream(_dirPath.UTF8String,
@@ skipping 12 matching lines @@
   }
   size_t read = 0;
   // Allocate memory using malloc so we can pass it direcly to NSData without
   // copying.
   std::unique_ptr<uint8_t[]> buffer(static_cast<uint8_t*>(malloc(bufferSize)));
   stream->ReadAll(buffer.get(), bufferSize, &read, nullptr);
   logData = [[NSMutableData alloc] initWithBytesNoCopy:buffer.release()
                                                 length:read];
   return logData;
 }
+#endif
 
 #pragma mark - Private
 
 - (rtc::LoggingSeverity)rtcSeverity {
   switch (_severity) {
     case RTCFileLoggerSeverityVerbose:
       return rtc::LS_VERBOSE;
     case RTCFileLoggerSeverityInfo:
       return rtc::LS_INFO;
     case RTCFileLoggerSeverityWarning:
       return rtc::LS_WARNING;
     case RTCFileLoggerSeverityError:
       return rtc::LS_ERROR;
   }
 }
 
 @end