revert last commit on list comprehension modified part

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@16305 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5SyncML/Publication.py

@@ -221,8 +221,10 @@ class Publication(Subscription):
     """
       Delete a subscriber for this publication
     """
-    if subscription_url in [o.getSubscriptionUrl() for o in self.getSubscriberList()]:
+    for o in self.getSubscriberList():
+      if o.getSubscriptionUrl() == subscription_url:
         self.manage_delObjects(o.id)
+        break
 
   def resetAllSubscribers(self):
     """