Trimming feed data points after a date to the end


I have a local emoncms with several feeds of Realtime-PHPFINA that stores historical data. If possible, I would like to remove/trim data after a particular date from these feeds.

I have tried using the feed APIs to delete and update the data (one point at a time). The delete didn’t seem to remove or null any points and the update was very slow and writing null just set them to zero.

I have also tried the EditRealtime visualisation, but was only able to edit single points.

Is there an quick and easy way of doing this?