Address denicija's comments for AppRTCMobile video codec setting.

webrtc/examples/objc/AppRTCMobile/ios/ARDSettingsViewController.m

 /*
  *  Copyright 2016 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 36 matching lines @@
 - (void)viewWillAppear:(BOOL)animated {
   [super viewWillAppear:animated];
   [self addCheckmarkInSection:ARDSettingsSectionVideoResolution
                     withArray:[self videoResolutionArray]
                     selecting:[_settingsModel currentVideoResolutionSettingFromStore]];
   [self addCheckmarkInSection:ARDSettingsSectionVideoCodec
                     withArray:[self videoCodecArray]
                     selecting:[_settingsModel currentVideoCodecSettingFromStore]];
 }
 
-- (void)viewDidAppear:(BOOL)animated {
-  [super viewDidAppear:animated];
-}
-
 #pragma mark - Data source
 
 - (NSArray<NSString *> *)videoResolutionArray {
   return _settingsModel.availableVideoResolutions;
 }
 
 - (NSArray<NSString *> *)videoCodecArray {
   return _settingsModel.availableVideoCodecs;
 }
 
@@ skipping 203 matching lines @@
 
   if (textField.text.length != 0) {
     bitrateNumber = [NSNumber numberWithInteger:textField.text.intValue];
   }
 
   [_settingsModel storeMaxBitrateSetting:bitrateNumber];
 }
 
 @end
 NS_ASSUME_NONNULL_END