Drupal module to delete the contents of a field
There is no module to do this. You could delete the field and recreate it, but you would have to
So core has the functionality but no direct mechanism to use it.
See also:
Make deleted fields work with config synch [#2198429] | Drupal.org
https://drupal.stackexchange.com/questions/177156/how-to-properly-delete-fields-programmatically