chore: fix linter error

Author: crisbeto

src/lib/select/select.spec.ts

@@ -1836,20 +1836,6 @@ class MultiSelect {
 }
 
 
-/**
- * TODO: Move this to core testing utility until Angular has event faking
- * support.
- *
- * Dispatches an event from an element.
- * @param eventName Name of the event
- * @param element The element from which the event will be dispatched.
- */
-function dispatchEvent(eventName: string, element: HTMLElement): void {
-  let event  = document.createEvent('Event');
-  event.initEvent(eventName, true, true);
-  element.dispatchEvent(event);
-}
-
 class FakeViewportRuler {
   getViewportRect() {
     return {