disabled upgrade menu until we can stabilize the tool (LYN-3799)

Gems/ScriptCanvas/Code/Editor/View/Windows/mainwindow.ui

@@ -133,12 +133,12 @@
     <addaction name="action_PresetsEditor"/>
     <addaction name="separator"/>
    </widget>
-   <widget class="QMenu" name="menuUtilities">
+   <!-- Disabled until tool is stabilized <widget class="QMenu" name="menuUtilities">
     <property name="title">
      <string>&amp;Utilities</string>
     </property>
     <addaction name="action_UpgradeTool"/>
-   </widget>
+   </widget> -->
    <widget class="QMenu" name="menuSettings_2">
     <property name="title">
      <string>&amp;Preferences</string>