sna/present: And drop bogus queued assertion

Don't forget that along the vblank path, we may use a timer instead of
the hw event in which case, we don't actually count the info as queued
(to hardware)

Reported-by: Christoph Haag <haagch@frickel.club>
References: https://bugs.freedesktop.org/show_bug.cgi?id=94829#c13
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

src/sna/sna_present.c

@@ -422,7 +422,6 @@ sna_present_queue_vblank(RRCrtcPtr crtc, uint64_t event_id, uint64_t msc)
 		return BadAlloc;
 	}
 
-	assert(info->queued);
 	return Success;
 }