macosx: remove outdated methods for fullscreen handling

(cherry picked from commit d9cfe67b8e23f388e45aee1919af1d4d773ec0d3)
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

modules/gui/macosx/MainWindow.h

@@ -186,7 +186,6 @@
 /* fullscreen handling */
 - (void)showFullscreenController;
 - (BOOL)isFullscreen;
-- (void)updateFullscreen;
 - (void)lockFullscreenAnimation;
 - (void)unlockFullscreenAnimation;
 - (void)enterFullscreen;
@@ -211,7 +210,6 @@
 }
 
 - (BOOL)isFullscreen;
-- (void)updateFullscreen;
 - (void)customZoom:(id)sender;
 
 @end

modules/gui/macosx/MainWindow.m

@@ -1720,11 +1720,6 @@ static VLCMainWindow *_o_sharedInstance = nil;
         [o_fspanel fadeIn];
 }
 
-- (void)updateFullscreen
-{
-    [[VLCMain sharedInstance] fullscreenChanged];
-}
-
 - (BOOL)isFullscreen
 {
     return b_fullscreen;
@@ -2654,11 +2649,6 @@ static VLCMainWindow *_o_sharedInstance = nil;
     [[VLCCoreInteraction sharedInstance] toggleFullscreen];
 }
 
-- (void)updateFullscreen
-{
-    [[VLCMain sharedInstance] fullscreenChanged];
-}
-
 - (BOOL)isFullscreen
 {
     return [[VLCMainWindow sharedInstance] isFullscreen];