Will re-enable anything queueing after 0.9.x merge

Revert "Any object (not just Notice's) can be queued"

This reverts commit 77ea02cac3.

scripts/handlequeued.php

@@ -50,7 +50,7 @@ if (empty($notice)) {
     exit(1);
 }
 
-if (!$handler->handle($notice)) {
+if (!$handler->handle_notice($notice)) {
     print "Failed to handle notice id $noticeId on queue '$queue'.\n";
     exit(1);
 }