present: Remove `present_event_abandon()`

This has never been actually implemented, do not tempt people to use it.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Michel Daenzer <michel.daenzer@amd.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
1 job for bug108249 in 2 minutes and 52 seconds (queued for 44 seconds)
Status Job ID Name Coverage
  Test
passed #34867
job

00:02:52