Revert "add VK CTS validation report for a0 interpolation fix"

This reverts commit 4eeda739c4.

Looks like @ajax has been playing with claude "ai" and accidentally
committed and pushed things to main.

1. That doesn't belong here.
2. We shouldn't bypass MR review unless in emergency situations.

This seems like a good time to remind people to not have a push-able
upstream remote, to avoid an accidental `git push` or something else
doing that.
One way to do this is to change the push url like this, assuming your
upstream remote is called `origin` (default if you didn't pick
something else):

    git remote set-url --push origin invalid-url

`invalid-url` will fail if you try to push to it, catching your mistakes :)

Spotted-by: Maíra Canal <mcanal@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39810>

.gitignore

@@ -7,9 +7,3 @@
 /build
 .venv/
 *.mda.tar
-
-# Gas Town (added by gt)
-.runtime/
-.claude/
-.beads/
-.logs/

claude-nwnk/a0-interpolation-cts-report.md

@@ -1,58 +0,0 @@
-# VK CTS validation: fury's a0 interpolation fix
-
-convoy: hq-cv-wr4iu (llvmpipe-rasterizer-validation)
-
-## summary
-
-fury's fix changes interpolation origin from framebuffer (0,0) to vertex 0
-position for numerical stability with triangles far from origin.
-
-**result: no regressions, no fixes detected. fix is safe from a CTS perspective.**
-
-## test results
-
-tested dEQP-VK categories focused on rasterization/interpolation.
-
-### dEQP-VK.rasterization.*
-
-| build | passed | failed | not supported |
-|-------|--------|--------|---------------|
-| baseline | 7448 | 0 | 7631 |
-| with fix | 7448 | 0 | 7631 |
-
-### dEQP-VK.draw.*
-
-| build | passed | failed | not supported |
-|-------|--------|--------|---------------|
-| baseline | 24015 | 0 | 6729 |
-| with fix | 24015 | 0 | 6729 |
-
-### dEQP-VK.pipeline.monolithic.multisample.*.verify_interpolation.*
-
-| build | passed | failed | not supported |
-|-------|--------|--------|---------------|
-| baseline | 15 | 0 | 18 |
-| with fix | 15 | 0 | 18 |
-
-## notes
-
-- the fix is designed for numerical stability with triangles far from origin,
-  which the CTS may not explicitly stress.
-- identical results baseline vs fix suggests no functional regression.
-- the "not supported" counts are expected - lavapipe doesn't expose all
-  features (shader_tile_image, android external formats, high sample counts, etc).
-
-## files changed
-
-12 files in src/gallium/drivers/llvmpipe/:
-- lp_bld_interp.c
-- lp_linear.c
-- lp_linear_fastpath.c
-- lp_linear_interp.c
-- lp_linear_priv.h
-- lp_linear_sampler.c
-- lp_rast.c
-- lp_setup_line.c
-- lp_setup_point.c
-- lp_state_fs_linear.c
-- lp_state_setup.c