Qt: remove unneeded debug.

(cherry picked from commit 72dbb98a)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/components/open_panels.hpp

@@ -122,7 +122,6 @@ protected:
         if( event->type() == QEvent::Hide ||
             event->type() == QEvent::HideToParent )
         {
-            msg_Warn( p_intf, "here" );
             event->accept();
             return true;
         }