rm unused node cache sql

persistence/0002_2.3.0_node_cache.sql

@@ -1,36 +0,0 @@
-/**
-* NEURON IIoT System for Industry 4.0
-* Copyright (C) 2020-2023 EMQ Technologies Co., Ltd All rights reserved.
-*
-* This program is free software; you can redistribute it and/or
-* modify it under the terms of the GNU Lesser General Public
-* License as published by the Free Software Foundation; either
-* version 3 of the License, or (at your option) any later version.
-*
-* This program is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-* Lesser General Public License for more details.
-*
-* You should have received a copy of the GNU Lesser General Public License
-* along with this program; if not, write to the Free Software Foundation,
-* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-**/
-
---- fix primary key ---
-BEGIN;
-
-DROP TABLE IF EXISTS old_node_cache;
-ALTER TABLE node_cache RENAME TO old_node_cache;
-
-CREATE TABLE IF NOT EXISTS node_cache (
-  node_name TEXT PRIMARY KEY,
-  CACHE TEXT NOT NULL,
-  FOREIGN KEY (node_name) REFERENCES nodes (name) ON UPDATE CASCADE ON DELETE CASCADE
-);
-
-INSERT OR REPLACE INTO node_cache SELECT * FROM old_node_cache;
-
-DROP TABLE old_node_cache;
-
-COMMIT;