#558: Developer can style content types output differently per viewport

- fix unit test

Author: omiroshnichenko

dev/tests/js/jasmine/tests/app/code/Magento/PageBuilder/view/frontend/web/js/content-type/row/appearance/default/widget.test.js

@@ -53,7 +53,7 @@ define([
                 imgSize: '100%',
                 speed: 1
             });
-            el.remove();
+            document.body.removeChild(el);
         });
     });
 });