diff --git a/back/methods/vn-user/is-token-valid.js b/back/methods/vn-user/is-token-valid.js
deleted file mode 100644
index 23b68797e..000000000
--- a/back/methods/vn-user/is-token-valid.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const tokenConfig = require('./token-config');
-
-module.exports = async token => {
-    const accessTokenConfig = await tokenConfig();
-    const now = Date.now();
-    const differenceMilliseconds = now - token.created;
-    const differenceSeconds = Math.floor(differenceMilliseconds / 1000);
-    return differenceSeconds < accessTokenConfig.renewPeriod - accessTokenConfig.courtesyTime;
-};
diff --git a/back/methods/vn-user/token-config.js b/back/methods/vn-user/token-config.js
deleted file mode 100644
index 0936e0b89..000000000
--- a/back/methods/vn-user/token-config.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const DEFAULT_FIELDS = ['renewPeriod', 'courtesyTime'];
-const {models} = require('vn-loopback/server/server');
-let currentAccessTokenConfig = null;
-module.exports = async(fields = DEFAULT_FIELDS) => {
-    if (currentAccessTokenConfig) return currentAccessTokenConfig;
-    const accessTokenConfig = await models.AccessTokenConfig.findOne({fields});
-    if (!accessTokenConfig) currentAccessTokenConfig = accessTokenConfig;
-    return accessTokenConfig;
-};