Revert "Issue #3321630 by jeffam: share.js incorrectly caches webforms with...

Revert "Issue #3321630 by jeffam: share.js incorrectly caches webforms with specific prepopulate fields"

This reverts commit 71ff46e7.

src/Entity/Webform.php

@@ -2272,10 +2272,6 @@ class Webform extends ConfigEntityBundleBase implements WebformInterface {
       $cache_contexts[] = 'url.query_args';
     }
     else {
-      // Add individual prepopulate fields.
-      foreach ($this->getElementsPrepopulate() as $element_key) {
-        $cache_contexts[] = 'url.query_args:' . $element_key;
-      }
       // Add source entity type and id query string parameters.
       if ($this->getSetting('form_prepopulate_source_entity')) {
         $cache_contexts[] = 'url.query_args:source_entity_type';