refactor: remove unused/old functions

apps/emqx_connector/src/emqx_connector_ldap.erl

@@ -28,7 +28,6 @@
         , on_stop/2
         , on_query/4
         , on_health_check/2
-        , on_jsonify/1
         ]).
 
 -export([do_health_check/1]).
@@ -43,9 +42,6 @@ roots() ->
 %% this schema has no sub-structs
 fields(_) -> [].
 
-on_jsonify(Config) ->
-    Config.
-
 %% ===================================================================
 on_start(InstId, #{servers := Servers0,
                    port := Port,

apps/emqx_connector/src/emqx_connector_mongo.erl

@@ -31,7 +31,6 @@
         , on_stop/2
         , on_query/4
         , on_health_check/2
-        , on_jsonify/1
         ]).
 
 %% ecpool callback
@@ -97,9 +96,6 @@ mongo_fields() ->
     ] ++
     emqx_connector_schema_lib:ssl_fields().
 
-on_jsonify(Config) ->
-    Config.
-
 %% ===================================================================
 
 on_start(InstId, Config = #{mongo_type := Type,

apps/emqx_connector/src/emqx_connector_mysql.erl

@@ -25,7 +25,6 @@
         , on_stop/2
         , on_query/4
         , on_health_check/2
-        , on_jsonify/1
         ]).
 
 -export([connect/1]).
@@ -43,11 +42,6 @@ fields(config) ->
     emqx_connector_schema_lib:relational_db_fields() ++
     emqx_connector_schema_lib:ssl_fields().
 
-%%=====================================================================
-
-on_jsonify(#{server := Server}= Config) ->
-    Config#{server => emqx_connector_schema_lib:ip_port_to_string(Server)}.
-
 %% ===================================================================
 on_start(InstId, #{server := {Host, Port},
                    database := DB,

apps/emqx_connector/src/emqx_connector_pgsql.erl

@@ -28,7 +28,6 @@
         , on_stop/2
         , on_query/4
         , on_health_check/2
-        , on_jsonify/1
         ]).
 
 -export([connect/1]).
@@ -49,9 +48,6 @@ fields(config) ->
     emqx_connector_schema_lib:relational_db_fields() ++
     emqx_connector_schema_lib:ssl_fields().
 
-on_jsonify(#{server := Server}= Config) ->
-    Config#{server => emqx_connector_schema_lib:ip_port_to_string(Server)}.
-
 named_queries(type) -> map();
 named_queries(nullable) -> true;
 named_queries(_) -> undefined.

apps/emqx_connector/src/emqx_connector_redis.erl

@@ -43,7 +43,6 @@
         , on_stop/2
         , on_query/4
         , on_health_check/2
-        , on_jsonify/1
         ]).
 
 -export([do_health_check/1]).
@@ -85,9 +84,6 @@ fields(sentinel) ->
     redis_fields() ++
     emqx_connector_schema_lib:ssl_fields().
 
-on_jsonify(Config) ->
-    Config.
-
 %% ===================================================================
 on_start(InstId, #{redis_type := Type,
                    database := Database,

apps/emqx_resource/src/emqx_resource.erl

@@ -70,7 +70,6 @@
 -export([ call_start/3  %% start the instance
         , call_health_check/3 %% verify if the resource is working normally
         , call_stop/3   %% stop the instance
-        , call_jsonify/2
         ]).
 
 -export([ list_instances/0 %% list all the instances, id only.
@@ -86,11 +85,8 @@
 
 -optional_callbacks([ on_query/4
                     , on_health_check/2
-                    , on_jsonify/1
                     ]).
 
--callback on_jsonify(resource_config()) -> jsx:json_term().
-
 %% when calling emqx_resource:start/1
 -callback on_start(instance_id(), resource_config()) ->
     {ok, resource_state()} | {error, Reason :: term()}.
@@ -284,13 +280,6 @@ call_health_check(InstId, Mod, ResourceState) ->
 call_stop(InstId, Mod, ResourceState) ->
     ?SAFE_CALL(Mod:on_stop(InstId, ResourceState)).
 
--spec call_jsonify(module(), resource_config()) -> jsx:json_term().
-call_jsonify(Mod, Config) ->
-    case erlang:function_exported(Mod, on_jsonify, 1) of
-        false -> Config;
-        true -> ?SAFE_CALL(Mod:on_jsonify(Config))
-    end.
-
 -spec check_config(resource_type(), raw_resource_config()) ->
     {ok, resource_config()} | {error, term()}.
 check_config(ResourceType, Conf) ->