freedreno/ci: Remove minetest trace

freedreno/ci: Remove minetest trace

I've repeatedly seen minor pixel changes due to changes that only affect
RA decisions, most recently in !22072. We changed the trace to hopefully
remove a use of texture() in control flow, but it seems there are more,
or the problem is something slightly different like reading
uninitialized values. On the other hand minetest has never actually
caught an issue for me that some other trace hasn't also caught. Just
remove it.

Cc: mesa-stable
Acked-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25864>
(cherry picked from commit 16214710caaacf4fb8539498a3eb774644921249)