[Geometry checker] Don't use QgsScrollArea...

src/plugins/geometry_checker/ui/qgsgeometrycheckerresulttab.ui

@@ -27,7 +27,7 @@
     <number>0</number>
    </property>
    <item row="0" column="0">
-    <widget class="QgsScrollArea" name="scrollArea">
+    <widget class="QScrollArea" name="scrollArea">
      <property name="frameShape">
       <enum>QFrame::NoFrame</enum>
      </property>
@@ -417,14 +417,6 @@
    </item>
   </layout>
  </widget>
- <customwidgets>
-  <customwidget>
-   <class>QgsScrollArea</class>
-   <extends>QScrollArea</extends>
-   <header>qgsscrollarea.h</header>
-   <container>1</container>
-  </customwidget>
- </customwidgets>
  <tabstops>
   <tabstop>scrollArea</tabstop>
   <tabstop>tableWidgetErrors</tabstop>