gluon-web-*: remove unused "token" form value

This was a remnant of LuCI that was never used in gluon-web.

(cherry picked from commit 94519cfc)

package/gluon-web-admin/files/lib/gluon/config-mode/view/admin/upgrade.html

@@ -44,7 +44,6 @@ $Id$
 
 	<div class="gluon-page-actions">
 		<input type="hidden" name="step" value="2" />
-		<input type="hidden" name="token" value="<%=token%>" />
 		<input class="gluon-button gluon-button-submit" type="submit" value="<%:Upload image%>" />
 	</div>
 </form>

package/gluon-web-admin/files/lib/gluon/config-mode/view/admin/upgrade_confirm.html

@@ -49,13 +49,11 @@ You may obtain a copy of the License at
   <form method="post" enctype="multipart/form-data" action="<%|url(request)%>" style="display:inline">
     <input type="hidden" name="step" value="3" />
     <input type="hidden" name="keepcfg" value="<%=keepconfig and "1" or "0"%>" />
-    <input type="hidden" name="token" value="<%=token%>" />
     <input class="gluon-button gluon-button-submit" type="submit" value="<%:Continue%>" />
   </form>
   <form method="post" enctype="multipart/form-data" action="<%|url(request)%>" style="display:inline">
     <input type="hidden" name="step" value="1" />
     <input type="hidden" name="keepcfg" value="<%=keepconfig and "1" or "0"%>" />
-    <input type="hidden" name="token" value="<%=token%>" />
     <input class="gluon-button gluon-button-reset" type="submit" value="<%:Cancel%>" />
   </form>
 </div>

package/gluon-web-model/files/lib/gluon/web/view/model/form.html

 <form method="post" enctype="multipart/form-data" action="<%|url(request)%>" data-update="reset">
-	<input type="hidden" name="token" value="<%=token%>" />
 	<input type="hidden" name="<%=id%>" value="1" />
 
 	<div class="gluon-form" id="form-<%=id%>">