remove init_db API from KVS at all

include/api.hrl

@@ -10,7 +10,6 @@
 -spec destroy() -> ok.
 -spec join() -> ok | {error,any()}.
 -spec join(Node :: string()) -> [{atom(),any()}].
--spec init_db() -> list(tuple(list(), skip | ok)).
 -spec init(Backend :: atom(), Module :: atom()) -> list(#table{}).
 
 % meta info

src/kvs.erl

@@ -12,7 +12,7 @@
 % NOTE: API Documentation
 
 -export([start/0,stop/0]).                                        % service
--export([destroy/0,join/0,join/1,init_db/0,init/2]).              % schema change
+-export([destroy/0,join/0,join/1,init/2]).                        % schema change
 -export([modules/0,containers/0,tables/0,table/1,version/0]).     % meta info
 -export([create/1,add/1,remove/2,remove/1]).                      % chain ops
 -export([put/1,delete/2,next_id/2]).                              % raw ops
@@ -202,11 +202,6 @@ entries(RecordType, Start, Count, Direction) ->
     E = traversal(RecordType, Start, Count, Direction),
     case Direction of #iterator.next -> lists:reverse(E); #iterator.prev -> E end.
 
-init_db() ->
-    case kvs:get(id_seq,"feed") of
-        {error,_} -> add_seq_ids();
-        {ok,_} -> skip end.
-
 add_seq_ids() ->
     Init = fun(Key) ->
            case kvs:get(id_seq, Key) of