delete the config file first, so that even if the request doesn't fully complete, the job won't be resurrected.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@21575 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/AbstractItem.java

@@ -274,6 +274,7 @@ public abstract class AbstractItem extends Actionable implements Item, HttpDelet
      * Does the real job of deleting the item.
      */
     protected void performDelete() throws IOException, InterruptedException {
+        getConfigFile().delete();
         Util.deleteRecursive(getRootDir());
     }