drop some unused custom widget descriptions

Change-Id: I21f170235729ee7ea34763d620704213bc9d3b32
Reviewed-on: https://gerrit.libreoffice.org/60171
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

extras/source/glade/libreoffice-catalog.xml.in

@@ -93,39 +93,6 @@
                         icon-name="widget-gtk-combobox">
     </glade-widget-class>
 
-    <glade-widget-class title="Gradient ListBox" name="svxlo-GradientLB"
-                        generic-name="GradientListBox" parent="GtkComboBox"
-                        icon-name="widget-gtk-combobox">
-      <properties>
-        <property save="True" query="False" id="dropdown" default="True" name="Use DropDown">
-          <parameter-spec>
-            <type>GParamBoolean</type>
-          </parameter-spec>
-        </property>
-      </properties>
-    </glade-widget-class>
-    <glade-widget-class title="Hatching ListBox" name="svxlo-HatchingLB"
-                        generic-name="HatchingListBox" parent="GtkComboBox"
-                        icon-name="widget-gtk-combobox">
-      <properties>
-        <property save="True" query="False" id="dropdown" default="True" name="Use DropDown">
-          <parameter-spec>
-            <type>GParamBoolean</type>
-          </parameter-spec>
-        </property>
-      </properties>
-    </glade-widget-class>
-    <glade-widget-class title="Bitmap ListBox" name="svxlo-BitmapLB"
-                        generic-name="BitmapListBox" parent="GtkComboBox"
-                        icon-name="widget-gtk-combobox">
-      <properties>
-        <property save="True" query="False" id="dropdown" default="True" name="Use DropDown">
-          <parameter-spec>
-            <type>GParamBoolean</type>
-          </parameter-spec>
-        </property>
-      </properties>
-    </glade-widget-class>
     <glade-widget-class title="Font Name ListBox" name="svtlo-FontNameBox"
                         generic-name="Font name ListBox" parent="GtkComboBox"
                         icon-name="widget-gtk-combobox">