Fix a qt warning message on startup

nyalldawson · nyalldawson · commit 72e4cf7db0b8 · 2016-10-25T12:30:23.000+10:00
diff --git a/src/ui/qgsmapstylingwidgetbase.ui b/src/ui/qgsmapstylingwidgetbase.ui
@@ -203,9 +203,7 @@
         </layout>
        </item>
        <item row="1" column="1">
-        <widget class="QgsPanelWidgetStack" name="mWidgetStack" native="true">
-         <layout class="QVBoxLayout" name="mWidgetArea"/>
-        </widget>
+        <widget class="QgsPanelWidgetStack" name="mWidgetStack" native="true"/>
        </item>
       </layout>
      </widget>
