Remove unused imports.

Author: adamghill

django_unicorn/static/js/eventListeners.js

@@ -1,11 +1,9 @@
 import {
   args,
-  contains,
   generateDbKey,
   hasValue,
   isEmpty,
   toKebabCase,
-  walk,
 } from "./utils.js";
 import { Element } from "./element.js";