[CP] fix a bug of swallowing ret code in drop_partition_info_for_nontemplate

src/share/schema/ob_partition_sql_helper.cpp

@@ -2040,7 +2040,6 @@ int ObDropIncPartHelper::drop_partition_info_for_nontemplate()
     if (OB_SUCC(ret) && inc_sub_part_num > 0) {
       int64_t affected_rows = 0;
       if (OB_FAIL(sql_client_.write(exec_tenant_id, sub_part_history_sql.ptr(), affected_rows))) {
-        ret = OB_ERR_UNEXPECTED;
         LOG_WARN("execute sql failed", K(ret), K(sub_part_history_sql));
       } else if (affected_rows != inc_sub_part_num) {
         ret = OB_ERR_UNEXPECTED;