db_sqlite: let the DB interface determine the capabilities

This prevens the module from advertising bogus capabilities - in this
case the sqlite module was saying that it has the ASYNC RAW queries
support, although it didn't.

Reported by Wilhelm Lundgren on list

(cherry picked from commit b9ca13a)

modules/db_sqlite/db_sqlite.c

@@ -120,7 +120,6 @@ int db_sqlite_bind_api(const str* mod, db_func_t *dbb)
 	dbb->last_inserted_id = db_last_inserted_id;
 	dbb->insert_update    = db_insert_update;
 
-	dbb->cap = DB_CAP_ALL ^ DB_CAP_ASYNC_RAW_QUERY;
 	return 0;
 }