Remove to-do to check if FIFO is ok on Wayland

Although Mailbox mode is recommended for use on Wayland, FIFO is
required by the Vulkan spec and after investigation our implementation
seems to be compliant with the spec.

Change-Id: Ib3230e31c4dd516bc40dc50c9e920fb145506145
Signed-off-by: Ben Davis <ben.davis@arm.com>
1 job for features_wayland in 2 minutes and 10 seconds (queued for 26 seconds)
Status Job ID Name Coverage
  Test
passed #9131747
build_vulkan_wsi_layer

00:02:10