Add a clear button that clears all smartdate widget fields (dates, times and HIDDEN end dates)

This module's project page links to a project that can be used to remove rows. Also, there is work underway in 📌 Refactor suppression of extra input row Needs review to refactor the way the Smart Date widgets are coded, in the hopes that using more of core's methods will allow them to use the Remove buttons that were recently added in core.

Thanks. I tried that.
The linked module did not work. I could not find out why. Apparently it works only for recurring dates or multiple value field settings.
But I am using one core date range field.