remove dead code

Sources/VLCPlaybackController.h

@@ -18,7 +18,6 @@
 @protocol VLCPlaybackControllerDelegate <NSObject>
 @optional
 - (void)playbackPositionUpdated:(VLCPlaybackController *)controller;
-//- (void)playbackRateUpdated:(float)rate forPlaybackController:(VLCPlaybackController *)controller;
 - (void)mediaPlayerStateChanged:(VLCMediaPlayerState)currentState
                       isPlaying:(BOOL)isPlaying
 currentMediaHasTrackToChooseFrom:(BOOL)currentMediaHasTrackToChooseFrom
@@ -28,7 +27,6 @@ currentMediaHasTrackToChooseFrom:(BOOL)currentMediaHasTrackToChooseFrom
 - (void)presentingViewControllerShouldBeClosed:(VLCPlaybackController *)controller;
 - (void)presentingViewControllerShouldBeClosedAfterADelay:(VLCPlaybackController *)controller;
 - (void)showStatusMessage:(NSString *)statusMessage forPlaybackController:(VLCPlaybackController *)controller;
-//- (void)audioOnlyPlaybackWasDetected:(BOOL)audioOnly forPlaybackController:(VLCPlaybackController *)controller;
 - (void)displayMetadataForPlaybackController:(VLCPlaybackController *)controller
                                        title:(NSString *)title
                                      artwork:(UIImage *)artwork

Sources/VLCPlaylistViewController.m

@@ -443,11 +443,6 @@ static NSString *kDisplayedFirstSteps = @"Did we display the first steps tutoria
     [self updateViewContents];
 }
 
-- (void)libraryWasUpdated
-{
-    [self updateViewContents];
-}
-
 - (void)updateViewContents
 {
     _foundMedia = [[NSMutableArray alloc] init];