Do not declare mod_muc as dependency of mod_mam to prevent loop in deps

src/mod_mam.erl

@@ -251,10 +251,7 @@ reload(Host, NewOpts, OldOpts) ->
     end.
 
 depends(_Host, Opts) ->
-    case proplists:get_bool(user_mucsub_from_muc_archive, Opts) of
-	true -> [{mod_muc, hard}, {mod_muc_admin, hard}];
-	false -> []
-    end.
+    [].
 
 -spec register_iq_handlers(binary()) -> ok.
 register_iq_handlers(Host) ->