Revert "import & export configuration"

src/lib/WireGuard.js

@@ -319,22 +319,6 @@ Endpoint = ${WG_HOST}:${WG_CONFIG_PORT}`;
     await this.saveConfig();
   }
 
-  async ___forceRestart() {
-    this.__configPromise = null;
-    await this.saveConfig();
-  }
-
-  async restoreConfiguration(config) {
-    const _config = JSON.parse(config);
-    await this.__saveConfig(_config);
-    await this.___forceRestart();
-  }
-
-  async backupConfiguration() {
-    const config = await this.getConfig();
-    return JSON.stringify(config, null, 2);
-  }
-
   // Shutdown wireguard
   async Shutdown() {
     await Util.exec('wg-quick down wg0').catch(() => { });