rabbit_definitions: Use maps:update_with/4 directly

... instead of using a copy of the function from Erlang 20. This is
possible because the requirement was bumped to Erlang 21.

Reported by Dialyzer.

1 files changed, 1 insertions, 14 deletions

diff --git a/src/rabbit_definitions.erl b/src/rabbit_definitions.erl
index 234ed122d0..68b0df600c 100644
--- a/src/rabbit_definitions.erl
+++ b/src/rabbit_definitions.erl
@@ -597,25 +597,12 @@ build_filtered_map([Queue|Rest], AccMap0) ->
     {Rec, VHost} = build_queue_data(Queue),
     case rabbit_amqqueue:lookup(Rec) of
         {error, not_found} ->
-            AccMap1 = maps_update_with(VHost, fun(V) -> V + 1 end, 1, AccMap0),
+            AccMap1 = maps:update_with(VHost, fun(V) -> V + 1 end, 1, AccMap0),
             build_filtered_map(Rest, AccMap1);
         {ok, _} ->
             build_filtered_map(Rest, AccMap0)
     end.
 
-%% Copy of maps:with_util/3 from Erlang 20.0.1.
-maps_update_with(Key,Fun,Init,Map) when is_function(Fun,1), is_map(Map) ->
-    case maps:find(Key,Map) of
-        {ok,Val} -> maps:update(Key,Fun(Val),Map);
-        error -> maps:put(Key,Init,Map)
-    end;
-maps_update_with(Key,Fun,Init,Map) ->
-    erlang:error(maps_error_type(Map),[Key,Fun,Init,Map]).
-
-%% Copy of maps:error_type/1 from Erlang 20.0.1.
-maps_error_type(M) when is_map(M) -> badarg;
-maps_error_type(V) -> {badmap, V}.
-
 validate_vhost_limit(VHost, AddCount, ok) ->
     WouldExceed = rabbit_vhost_limit:would_exceed_queue_limit(AddCount, VHost),
     validate_vhost_queue_limit(VHost, AddCount, WouldExceed).