How to remove geotags from SENT photos via iMessage or MMS

I have just changed my Privacy to not show my location on photos from now on.

However, is there a way to remove geotags from photos that have already been sent via imessage or mms??

I know there are apps (eg. deGeo) available that remove geotags on photos in your camera roll BEFORE safely sharing them so they don't have a location.

But is there such an app to remove it once it has already been sent so that the person/s who have received it cannot see the location anymore?

I have an iPhone 6s Plus.

HELP!!