Don't log the auth_backends fallback message #13464

Doing so for every HTTP API request is excessive
even at debug level.

(cherry picked from commit 830374c)

Author: michaelklishin

deps/rabbitmq_web_dispatch/src/rabbit_web_dispatch_access_control.erl

@@ -365,8 +365,8 @@ is_basic_auth_disabled(#auth_settings{basic_auth_enabled = Enabled}) ->
 
 get_auth_backends() ->
     case application:get_env(rabbitmq_web_dispatch, auth_backends) of
-		{ok, Backends} -> {ok, Backends};
-		undefined -> rabbit_log:debug("rabbitmq_web_dispatch.auth_backends not configured,
-                                falling back to rabbit.auth_backends"),
-                     application:get_env(rabbit, auth_backends)
+		{ok, Backends} ->
+            {ok, Backends};
+		undefined ->
+            application:get_env(rabbit, auth_backends)
 	end.