chore(gw): fix dialyzer warnings

apps/emqx_gateway/src/emqx_gateway_http.erl

@@ -200,7 +200,7 @@ remove_listener(ListenerId) ->
       #{<<"listeners">> => #{Type => NLConf}}
      ).
 
--spec update_listener(binary(), map()) -> ok | {error, any()}.
+-spec update_listener(atom() | binary(), map()) -> ok | {error, any()}.
 update_listener(ListenerId, NewConf0) ->
     {GwName, Type, Name} = emqx_gateway_utils:parse_listener_id(ListenerId),
     NewConf = maps:without([<<"id">>, <<"name">>,
@@ -299,7 +299,7 @@ with_channel(GwName, ClientId, Fun) ->
 %% Utils
 %%--------------------------------------------------------------------
 
--spec return_http_error(integer(), binary()) -> {integer(), binary()}.
+-spec return_http_error(integer(), any()) -> {integer(), binary()}.
 return_http_error(Code, Msg) ->
     {Code, emqx_json:encode(
              #{code => codestr(Code),

apps/emqx_gateway/src/emqx_gateway_utils.erl

@@ -33,7 +33,6 @@
         , unix_ts_to_rfc3339/2
         , listener_id/3
         , parse_listener_id/1
-        , parse_listener_id2/1
         ]).
 
 -export([ stringfy/1
@@ -134,6 +133,8 @@ listener_id(GwName, Type, LisName) ->
         (bin(LisName))/binary
       >>).
 
+parse_listener_id(Id) when is_atom(Id) ->
+    parse_listener_id(atom_to_binary(Id));
 parse_listener_id(Id) ->
     try
         [GwName, Type, Name] = binary:split(bin(Id), <<":">>, [global]),
@@ -142,12 +143,6 @@ parse_listener_id(Id) ->
         _ : _ -> error({invalid_listener_id, Id})
     end.
 
-parse_listener_id2(Id) ->
-    {GwName, Type, Name} = parse_listener_id(Id),
-    {binary_to_existing_atom(GwName),
-     binary_to_existing_atom(Type),
-     binary_to_atom(Name)}.
-
 bin(A) when is_atom(A) ->
     atom_to_binary(A);
 bin(L) when is_list(L); is_binary(L) ->