Revert "Add no-use-before-define linter rule"

This reverts commit fdcc5d68a2.

Unfortunately, this requires us to move exports to the bottom.
This in turn causes circular dep issues and also access of
exports.GLOBAL_VAR in the global context

src/backupformat/rsync.js

@@ -1,5 +1,16 @@
 'use strict';
 
+exports = module.exports = {
+    download,
+    upload,
+    verify,
+    getFileExtension,
+    copy,
+
+    _saveFsMetadata: saveFsMetadata,
+    _restoreFsMetadata: restoreFsMetadata
+};
+
 const assert = require('node:assert'),
     async = require('async'),
     backupSites = require('../backupsites.js'),
@@ -372,13 +383,3 @@ async function verify(backupSite, remotePath, integrityMap, progressCallback) {
     };
 }
 
-exports = module.exports = {
-    download,
-    upload,
-    verify,
-    getFileExtension,
-    copy,
-
-    _saveFsMetadata: saveFsMetadata,
-    _restoreFsMetadata: restoreFsMetadata
-};