fix(rule): remove rules from all nodes in the cluster

apps/emqx_rule_engine/src/emqx_rule_engine.erl

@@ -119,7 +119,7 @@ post_config_update(_, _Req, NewRules, OldRules, _AppEnvs) ->
 load_rules() ->
     maps_foreach(fun({Id, Rule}) ->
             {ok, _} = create_rule(Rule#{id => bin(Id)})
-        end, emqx_conf:get([rule_engine, rules], #{})).
+        end, emqx:get_config([rule_engine, rules], #{})).
 
 -spec create_rule(map()) -> {ok, rule()} | {error, term()}.
 create_rule(Params = #{id := RuleId}) when is_binary(RuleId) ->

apps/emqx_rule_engine/src/emqx_rule_engine_api.erl

@@ -246,7 +246,7 @@ param_path_id() ->
 
 '/rules/:id'(delete, #{bindings := #{id := Id}}) ->
     ConfPath = emqx_rule_engine:config_key_path() ++ [Id],
-    case emqx:remove_config(ConfPath, #{}) of
+    case emqx_conf:remove(ConfPath, #{}) of
         {ok, _} -> {204};
         {error, Reason} ->
             ?SLOG(error, #{msg => "delete_rule_failed",