chore(emqx_data_bridge): delete stale app dir

apps/emqx_data_bridge/src/emqx_data_bridge_schema.erl

@@ -1,25 +0,0 @@
--module(emqx_data_bridge_schema).
-
--export([roots/0, fields/1]).
-
-%%======================================================================================
-%% Hocon Schema Definitions
-
--define(TYPES, [mysql, pgsql, mongo, redis, ldap]).
--define(BRIDGES, [hoconsc:ref(?MODULE, T) || T <- ?TYPES]).
-
-roots() -> ["emqx_data_bridge"].
-
-fields("emqx_data_bridge") ->
-    [{bridges, #{type => hoconsc:array(hoconsc:union(?BRIDGES)),
-                 default => []}}];
-
-fields(mysql) -> connector_fields(emqx_connector_mysql, mysql);
-fields(pgsql) -> connector_fields(emqx_connector_pgsql, pgsql);
-fields(mongo) -> connector_fields(emqx_connector_mongo, mongo);
-fields(redis) -> connector_fields(emqx_connector_redis, redis);
-fields(ldap)  -> connector_fields(emqx_connector_ldap, ldap).
-
-connector_fields(ConnectModule, DB) ->
-    [{name, hoconsc:mk(typerefl:binary())},
-     {type, #{type => DB}}] ++ ConnectModule:roots().