remove field to upload signature

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5961 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_base/SkinTemplateItem/portal_skins/erp5_base/Agent_view.xml

@@ -120,7 +120,6 @@
                     <value>
                       <list>
                         <string>Image_view</string>
-                        <string>my_file</string>
                       </list>
                     </value>
                 </item>