erp5_mrp: remove action from ready to start

user bypass normal process by call direction workflow action

bt5/erp5_mrp/WorkflowTemplateItem/portal_workflow/production_packing_list_workflow/state_ready.xml

@@ -19,10 +19,15 @@
                 <string>destination/portal_workflow/production_packing_list_workflow/transition_cancel</string>
                 <string>destination/portal_workflow/production_packing_list_workflow/transition_cancel_action</string>
                 <string>destination/portal_workflow/production_packing_list_workflow/transition_start</string>
-                <string>destination/portal_workflow/production_packing_list_workflow/transition_start_action</string>
               </tuple>
             </value>
         </item>
+        <item>
+            <key> <string>comment</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
         <item>
             <key> <string>description</string> </key>
             <value>