Qt: remove unneeded code.

modules/gui/qt4/components/preferences_widgets.cpp

@@ -998,7 +998,7 @@ BoolConfigControl::BoolConfigControl( vlc_object_t *_p_this,
                    VIntConfigControl( _p_this, _p_item )
 {
     checkbox = _checkbox;
-    label = _label;
+    VLC_UNUSED( _label );
     finish();
 }
 
@@ -1007,8 +1007,6 @@ void BoolConfigControl::finish()
     checkbox->setCheckState( p_item->value.i == true ? Qt::Checked
                                                         : Qt::Unchecked );
     checkbox->setToolTip( formatTooltip(qtr(p_item->psz_longtext)) );
-    if( label )
-        label->setToolTip( formatTooltip(qtr(p_item->psz_longtext)) );
 }
 
 int BoolConfigControl::getValue()

modules/gui/qt4/components/preferences_widgets.hpp

@@ -192,7 +192,6 @@ public:
     virtual int getType() { return CONFIG_ITEM_BOOL; }
 private:
     QCheckBox *checkbox;
-    QLabel *label;
     void finish();
 };