test: drop proxies

the gitlab runner now uses a transparent proxy setup

Change-Id: I977a547d2e7b1d9545ad0d5c9edfd25257264d42

.gitlab-ci.yml

@@ -7,11 +7,6 @@ stages:
 variables:
   GITLAB_BUILD_ENV_DOCKER_IMAGE: docker-registry.ebrains.eu/tc/ebrains-spack-build-env/gitlab_runners_nfs:gitlab_runners_nfs_23.06
   YASHCHIKI_HOME: ${CI_PROJECT_DIR}/.yashchiki
-  http_proxy: "http://proxy.kip.uni-heidelberg.de:8080"
-  https_proxy: "http://proxy.kip.uni-heidelberg.de:8080"
-  HTTP_PROXY: "http://proxy.kip.uni-heidelberg.de:8080"
-  HTTPS_PROXY: "http://proxy.kip.uni-heidelberg.de:8080"
-  ALL_PROXY: "http://proxy.kip.uni-heidelberg.de:8080"
   SYSTEMNAME: "image_laptop"
   SPACK_ENVIRONMENT_REPO: "${CI_PROJECT_DIR}/esd_spack/var/spack/repos/ebrains-spack-builds"
   SPACK_ENVIRONMENT_PATH: "${CI_PROJECT_DIR}/esd_spack/var/spack/environments/default"