EXT:form element type URL element inspector shows a stray Validator label without options
With the deprecation removal of regular expressions
based EXT:form validators in #101070, the set of available
validators for the form element type URL became empty.
Instead of only removing the select element from the DOM,
the entire form-group should e removed, in order to also hide
the corresponding <label> tag, as such a stray label tag
isn't hehlpful for an enduser and is therefore actually even
invalid HTML (as the reference to an input element is missing).