Remove unnecessary, redundant timing functions

src/extension.js

@@ -14,7 +14,6 @@ import {Extension} from 'resource:///org/gnome/shell/extensions/extension.js';
 
 import { md5 } from './lib/md5.js'
 import { gr_log, gr_debug } from './utils/logger.js'
-import { setInterval, clearInterval } from './utils/timing.js'
 
 export default class GravatarExtension extends Extension {
   constructor(metadata) {

src/utils/timing.js

@@ -1,17 +0,0 @@
-'use strict';
-
-import GLib from 'gi://GLib';
-
-/* exported setInterval */
-export function setInterval(func, millis) {
-  return GLib.timeout_add(GLib.PRIORITY_DEFAULT, millis, () => {
-    func();
-    // Repeat
-    return true;
-  });
-}
-
-/* exported clearInterval */
-export function clearInterval(id) {
-  return GLib.Source.remove(id);
-}