diff --git a/apps/emqx_durable_storage/src/emqx_ds_conf.erl b/apps/emqx_durable_storage/src/emqx_ds_conf.erl
deleted file mode 100644
index d9e1efd57..000000000
--- a/apps/emqx_durable_storage/src/emqx_ds_conf.erl
+++ /dev/null
@@ -1,73 +0,0 @@
-%%--------------------------------------------------------------------
-%% Copyright (c) 2023 EMQ Technologies Co., Ltd. All Rights Reserved.
-%%--------------------------------------------------------------------
--module(emqx_ds_conf).
-
-%% TODO: make a proper HOCON schema and all...
-
-%% API:
--export([keyspace_config/1, db_options/1]).
-
--export([iteration_options/1]).
--export([default_iteration_options/0]).
-
--export_type([
-    backend_config/0,
-    iteration_options/0
-]).
-
--type backend_config() ::
-    {emqx_ds_message_storage_bitmask, emqx_ds_storage_bitfield_lts:options()}
-    | {module(), _Options}.
-
--type keyspace() :: atom().
--type iteration_options() :: map().
-
-%%================================================================================
-%% API funcions
-%%================================================================================
-
--define(APP, emqx_ds).
-
--spec keyspace_config(keyspace()) -> backend_config().
-keyspace_config(Keyspace) ->
-    DefaultKeyspaceConfig = application:get_env(
-        ?APP,
-        default_keyspace_config,
-        default_keyspace_config()
-    ),
-    Keyspaces = application:get_env(?APP, keyspace_config, #{}),
-    maps:get(Keyspace, Keyspaces, DefaultKeyspaceConfig).
-
--spec iteration_options(keyspace()) ->
-    iteration_options().
-iteration_options(Keyspace) ->
-    case keyspace_config(Keyspace) of
-        {emqx_ds_message_storage_bitmask, Config} ->
-            maps:get(iteration, Config, default_iteration_options());
-        {_Module, _} ->
-            default_iteration_options()
-    end.
-
--spec default_iteration_options() -> iteration_options().
-default_iteration_options() ->
-    {emqx_ds_message_storage_bitmask, Config} = default_keyspace_config(),
-    maps:get(iteration, Config).
-
--spec default_keyspace_config() -> backend_config().
-default_keyspace_config() ->
-    {emqx_ds_message_storage_bitmask, #{
-        db_options => [],
-        timestamp_bits => 64,
-        topic_bits_per_level => [8, 8, 8, 32, 16],
-        epoch => 5,
-        iteration => #{
-            iterator_refresh => {every, 100}
-        }
-    }}.
-
--spec db_options(keyspace()) -> emqx_ds_storage_layer:options().
-db_options(Keyspace) ->
-    DefaultDBOptions = application:get_env(?APP, default_db_options, []),
-    Keyspaces = application:get_env(?APP, keyspace_config, #{}),
-    emqx_utils_maps:deep_get([Keyspace, db_options], Keyspaces, DefaultDBOptions).