Every once in a while it's nice to be able to remove a Dashing widget. Maybe the data's stale, or otherwise may have bad data. This is a short snip that can be added into another Dashing job. Obviously this sort of job isn't what you'd want, but it should give you the info enough to put this into your own solution.
Widgets using this data will still exist, but just not have that data to pull from. Forcing a refresh of the dashboard (if it's up constantly) can then have it re-poll for the non-existant data, causing the widgets to revert to their "no data" state.