travis: remove workarounds for the Vulkan target

Previously we required --enable-egl for the platform selection to work.
Additionally due to the broken DRI3 dependency tracking we needed
--enable-glx.

Since both of these are now sorted now we no longer need the
workarounds.

While we're here, explicitly enable dri3.

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
1 file changed