Not tok sure how to remove it
Just go to edit post highlight and hit delete. Sure the Mods will be on this soon and hide it from the public.
Three dots on the right of you post select edit make sure cursor is next to picture hit delete
Cheers mate. I thought it would be easier to it on the thread but there was no delete .
Within your posts, go to the three dots top right hit edit, make sure cursor is next to screen shot then hit the x on your keypad. Or just hold x until full post is deleted.