Bug 631143 - Remove timezone icon from main time-admin dialog

Remove the "stock_timezone" icon in the timezone button.
This icon name no longer seems to exist, and usability-wise
it's not a good idea anyway.

https://bugzilla.gnome.org/show_bug.cgi?id=631143

interfaces/time.ui

@@ -328,31 +328,10 @@
             <property name="receives_default">False</property>
             <signal name="clicked" handler="timezone_button_clicked"/>
             <child>
-              <object class="GtkHBox" id="hbox52">
+              <object class="GtkLabel" id="tzlabel">
                 <property name="visible">True</property>
-                <property name="spacing">6</property>
-                <child>
-                  <object class="GtkImage" id="image14">
-                    <property name="visible">True</property>
-                    <property name="pixel_size">1</property>
-                    <property name="icon_name">stock_timezone</property>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">False</property>
-                    <property name="position">0</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkLabel" id="tzlabel">
-                    <property name="visible">True</property>
-                    <property name="xalign">0</property>
-                    <property name="label" translatable="yes">Unconfigured</property>
-                  </object>
-                  <packing>
-                    <property name="position">1</property>
-                  </packing>
-                </child>
+                <property name="xalign">0</property>
+                <property name="label" translatable="yes">Unconfigured</property>
               </object>
             </child>
           </object>