Remove old build system

mk/common-test.sh

@@ -1,31 +0,0 @@
-# shellcheck shell=bash
-
-# Remove overall test dir (at most one of the two should match) and
-# remove file extension.
-
-test_name=$(echo -n "${test?must be defined by caller (test runner)}" | sed \
-    -e "s|^src/[^/]*-test/data/||" \
-    -e "s|^tests/functional/||" \
-    -e "s|\.sh$||" \
-    )
-
-# Layer violation, but I am not inclined to care too much, as this code
-# is about to be deleted.
-src_dir=$(realpath tests/functional)
-
-# shellcheck disable=SC2016
-TESTS_ENVIRONMENT=(
-    "TEST_NAME=$test_name"
-    'NIX_REMOTE='
-    'PS4=+(${BASH_SOURCE[0]-$0}:$LINENO) '
-    "_NIX_TEST_SOURCE_DIR=${src_dir}"
-    "_NIX_TEST_BUILD_DIR=${src_dir}"
-)
-
-unset src_dir
-
-read -r -a bash <<< "${BASH:-/usr/bin/env bash}"
-
-run () {
-   cd "$(dirname "$1")" && env "${TESTS_ENVIRONMENT[@]}" "${bash[@]}" -x -e -u -o pipefail "$(basename "$1")"
-}