chore(popups): Move popup configs to electron-utils

modules/API/external/electronPopupsConfig.json

-{
-    "google-auth": {
-        "matchPatterns": {
-            "url": "accounts.google.com"
-        },
-        "target": "electron"
-    },
-    "dropbox-auth": {
-        "matchPatterns": {
-            "url": "dropbox.com/oauth2/authorize"
-        },
-        "target": "electron"
-    }
-}

modules/API/external/external_api.js

     Transport
 } from '../../transport';
 
-import electronPopupsConfig from './electronPopupsConfig.json';
 import {
     getAvailableDevices,
     getCurrentDevices,
     stopRecording(mode) {
         this.executeCommand('startRecording', mode);
     }
-
-    /**
-     * Returns the configuration for electron for the windows that are open
-     * from Jitsi Meet.
-     *
-     * @returns {Promise<Object>}
-     *
-     * NOTE: For internal use only.
-     */
-    _getElectronPopupsConfig() {
-        return Promise.resolve(electronPopupsConfig);
-    }
 }