With the migration concluded on !37510 of the lava-job-submitter (it is now an
independent project under the gfx-ci namespace), a lava requirements file was
not necessary anymore, but there was still one reference.
Signed-off-by: Sergi Blanch Torne <sergi.blanch.torne@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37713>