remove deferred promise unused

js/modules/deferred_to_promise.d.ts

@@ -1 +0,0 @@
-export function deferredToPromise<T>(deferred: JQuery.Deferred<any, any, any>): Promise<T>;

js/modules/deferred_to_promise.js

@@ -1,3 +0,0 @@
-exports.deferredToPromise = deferred =>
-  // eslint-disable-next-line more/no-then
-  new Promise((resolve, reject) => deferred.then(resolve, reject));

preload.js

@@ -5,8 +5,6 @@ const path = require('path');
 const { webFrame, remote, clipboard, ipcRenderer } = require('electron');
 const semver = require('semver');
 
-const { deferredToPromise } = require('./js/modules/deferred_to_promise');
-
 const { app } = remote;
 
 const config = require('url').parse(window.location.toString(), true).query;
@@ -74,8 +72,6 @@ window.versionInfo = {
   appInstance: window.getAppInstance(),
 };
 
-window.wrapDeferred = deferredToPromise;
-
 const ipc = ipcRenderer;
 const localeMessages = ipc.sendSync('locale-data');