ci: remove obsolete build-hang-detection script

The build-hang-detection script was part of the old parallel-deqp-runner
repository which is now superseded by deqp-runner.

Remove the script because it’s no longer used.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31429>

.gitlab-ci/container/build-hang-detection.sh

@@ -1,16 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-PARALLEL_DEQP_RUNNER_VERSION=fe557794b5dadd8dbf0eae403296625e03bda18a
-
-git clone https://gitlab.freedesktop.org/mesa/parallel-deqp-runner --single-branch -b master --no-checkout /parallel-deqp-runner
-pushd /parallel-deqp-runner
-git checkout "$PARALLEL_DEQP_RUNNER_VERSION"
-meson . _build
-ninja -C _build hang-detection
-mkdir -p build/bin
-install _build/hang-detection build/bin
-strip build/bin/*
-find . -not -path './build' -not -path './build/*' -delete
-popd

.gitlab-ci/container/debian/test-vk.sh

@@ -91,10 +91,6 @@ wine \
 
 . .gitlab-ci/container/container_pre_build.sh
 
-############### Build parallel-deqp-runner's hang-detection tool
-
-. .gitlab-ci/container/build-hang-detection.sh
-
 ############### Build piglit replayer
 # We don't run any _piglit_ Vulkan tests in the containers.
 PIGLIT_OPTS="-DPIGLIT_USE_WAFFLE=ON