1. @DomName('FormData.delete')
  2. @DocsEditable()
  3. @Experimental()
void delete(String name)

Source 

@DomName('FormData.delete')
@DocsEditable()
@Experimental() // untriaged
void delete(String name) =>
    _blink.BlinkFormData.instance.delete_Callback_1_(this, name);