&delete_request allow deleting others req

This commit makes it possible for other admins to delete requests easily

plugins/tildeadmin.py

@@ -38,5 +38,8 @@ def tilde_requests_plugin(msg):
 def delete_tilde_request_plugin(msg):
     if (msg.nick not in msg.ops and not util.tilde.DEBUG) and (not msg.nick in util.tilde.challenges):
         return
-    del util.tilde.challenges[msg.nick]
+    if msg.arg:
+        del util.tilde.challenges[msg.arg]
+    else:
+        del util.tilde.challenges[msg.nick]
     return pinhook.plugin.message("Deleted")