macosx: remove show details button from error panel

It does not make sense to open the messages window here anymore, as
it will not show any additional details if not already open.

modules/gui/macosx/coredialogs.h

@@ -35,7 +35,6 @@
     IBOutlet id o_window;
     IBOutlet id o_cleanup_button;
     IBOutlet id o_error_table;
-    IBOutlet id o_messages_btn;
 
     NSMutableArray * o_errors;
     NSMutableArray * o_icons;
@@ -43,7 +42,6 @@
     BOOL b_nib_loaded;
 }
 - (IBAction)cleanupTable:(id)sender;
-- (IBAction)showMessages:(id)sender;
 
 -(void)showPanel;
 -(void)addError: (NSString *)o_error withMsg:(NSString *)o_msg;

modules/gui/macosx/coredialogs.m

@@ -242,7 +242,6 @@ static VLCCoreDialogProvider *_o_sharedInstance = nil;
     /* init strings */
     [o_window setTitle: _NS("Errors and Warnings")];
     [o_cleanup_button setTitle: _NS("Clean up")];
-    [o_messages_btn setTitle: _NS("Show Details")];
 }
 
 -(void)dealloc
@@ -284,11 +283,6 @@ static VLCCoreDialogProvider *_o_sharedInstance = nil;
     [o_error_table reloadData];
 }
 
--(IBAction)showMessages:(id)sender
-{
-    [[VLCMain sharedInstance] showMessagesPanel: sender];
-}
-
 /*----------------------------------------------------------------------------
  * data source methods
  *---------------------------------------------------------------------------*/