Remove workarounds to CI Github Action as it didn't consistently work…

…. Let's

see if the switch to bind mounts will finally resolve the issues.

.github/workflows/ci.yml

@@ -42,9 +42,6 @@ jobs:
           make dockerbuild
       - name: Start services
         run: |
-          grep -E "DOCKER_MIGRID_ROOT=|MIG_SYSTEM_RUN=" .env
-          echo "NOTE: use sequential start here to make docker bind mounts behave"
-          export COMPOSE_PARALLEL_LIMIT=1
           make up
       - name: Run tests
         run: |