remove the help button but from the subscribe dialog.

mail/base/content/subscribe.xul

@@ -28,18 +28,16 @@
         width="500"
         height="400"
         persist="width height screenX screenY"
-        buttons="accept,cancel,help"
         onload="SubscribeOnLoad()"
         onunload="SubscribeOnUnload()"
         ondialogaccept="return subscribeOK();"
-        ondialogcancel="return subscribeCancel();"
-        ondialoghelp="return doHelpButton();">   
+        ondialogcancel="return subscribeCancel();">   
      
 <stringbundle id="bundle_subscribe" src="chrome://messenger/locale/subscribe.properties"/>
+
 <script type="application/x-javascript" src="chrome://messenger/content/mailWindow.js"/>
 <script type="application/x-javascript" src="chrome://messenger/content/subscribe.js"/>
 <script type="application/x-javascript" src="chrome://messenger/content/widgetglue.js"/>
-<script type="application/x-javascript" src="chrome://help/content/contextHelp.js"/>
 
   <grid flex="1" style="width: 40em; height: 25em;">
     <columns>
@@ -94,7 +92,7 @@
               seltype="multiple"
               datasources="rdf:null"
               flags="dont-build-content"
-              disableKeyNavigation="true"
+              disableKeyNavigation="true"
               statedatasource="rdf:null"
               onkeypress="onSubscribeTreeKeyPress(event);"
               onclick="SubscribeOnClick(event);"> 
@@ -188,5 +186,5 @@
       </row>
     </rows>
   </grid>
-  <separator  class="thin"/>
+  <separator class="thin"/>
 </dialog>