Revert "Attempt to return focus explicitly to dropdown trigger (#41365)" (#41668)

This reverts commit 24305e7b18.

js/src/dropdown.js

@@ -207,9 +207,6 @@ class Dropdown extends BaseComponent {
     this._element.setAttribute('aria-expanded', 'false')
     Manipulator.removeDataAttribute(this._menu, 'popper')
     EventHandler.trigger(this._element, EVENT_HIDDEN, relatedTarget)
-
-    // Explicitly return focus to the trigger element
-    this._element.focus()
   }
 
   _getConfig(config) {