remount does not need a backend hook

src/storage/s3.js

@@ -15,8 +15,6 @@ exports = module.exports = {
     remove,
     removeDir,
 
-    remount,
-
     testConfig,
     removePrivateFields,
     injectPrivateFields,
@@ -532,10 +530,6 @@ async function removeDir(apiConfig, pathPrefix, progressCallback) {
     progressCallback({ message: `Removed ${total} files` });
 }
 
-async function remount(apiConfig) {
-    assert.strictEqual(typeof apiConfig, 'object');
-}
-
 async function testConfig(apiConfig) {
     assert.strictEqual(typeof apiConfig, 'object');