ci: Remove redundant RUN_UNIT_TESTS_SEQUENTIAL

.github/workflows/ci.yml

@@ -379,7 +379,7 @@ jobs:
       - name: Run unit tests
         # Can't use ctest here like other jobs as we don't have a CMake build tree.
         run: |
-          ./bin/test_bitcoin.exe -l test_suite
+          ./bin/test_bitcoin.exe -l test_suite  # Intentionally run sequentially here, to catch test case failures caused by dirty global state from prior test cases.
           ./src/secp256k1/bin/exhaustive_tests.exe
           ./src/secp256k1/bin/noverify_tests.exe
           ./src/secp256k1/bin/tests.exe

ci/test/00_setup_env_native_previous_releases.sh

@@ -12,8 +12,6 @@ export CI_IMAGE_NAME_TAG="mirror.gcr.io/ubuntu:22.04"
 export PACKAGES="gcc-11 g++-11 python3-zmq"
 export DEP_OPTS="CC=gcc-11 CXX=g++-11"
 export TEST_RUNNER_EXTRA="--previous-releases --coverage --extended --exclude feature_dbcrash"  # Run extended tests so that coverage does not fail, but exclude the very slow dbcrash
-export RUN_UNIT_TESTS_SEQUENTIAL="true"
-export RUN_UNIT_TESTS="false"
 export GOAL="install"
 export CI_LIMIT_STACK_SIZE=1
 export DOWNLOAD_PREVIOUS_RELEASES="true"

ci/test/03_test_script.sh

@@ -74,7 +74,7 @@ if [ "$RUN_FUZZ_TESTS" = "true" ]; then
     echo "Using qa-assets repo from commit ..."
     git log -1
   )
-elif [ "$RUN_UNIT_TESTS" = "true" ] || [ "$RUN_UNIT_TESTS_SEQUENTIAL" = "true" ]; then
+elif [ "$RUN_UNIT_TESTS" = "true" ]; then
   export DIR_UNIT_TEST_DATA=${DIR_QA_ASSETS}/unit_test_data/
   if [ ! -d "$DIR_UNIT_TEST_DATA" ]; then
     mkdir -p "$DIR_UNIT_TEST_DATA"
@@ -176,10 +176,6 @@ if [ "$RUN_UNIT_TESTS" = "true" ]; then
     --timeout $(( TEST_RUNNER_TIMEOUT_FACTOR * 60 ))
 fi
 
-if [ "$RUN_UNIT_TESTS_SEQUENTIAL" = "true" ]; then
-  DIR_UNIT_TEST_DATA="${DIR_UNIT_TEST_DATA}" LD_LIBRARY_PATH="${DEPENDS_DIR}/${HOST}/lib" "${BASE_BUILD_DIR}"/bin/test_bitcoin --catch_system_errors=no -l test_suite
-fi
-
 if [ "$RUN_FUNCTIONAL_TESTS" = "true" ]; then
   # parses TEST_RUNNER_EXTRA as an array which allows for multiple arguments such as TEST_RUNNER_EXTRA='--exclude "rpc_bind.py --ipv6"'
   eval "TEST_RUNNER_EXTRA=($TEST_RUNNER_EXTRA)"