some git cleanup

.gitlab-ci-bullseye.yml

-# Build a bullseye Debian package
-stages:
-  - startup
-  - build-deb
-
-variables:
-  # DOCKER_DEB_PACKAGE_BUILDER: this is the name of the
-  # of the Docker image that builds the Debian package. There should
-  # be little reason to change this value.
-  DOCKER_DEB_PACKAGE_BUILDER: macrotex/debian-package-docker
-
-init-message:
-  stage: startup
-  script:
-    - echo "building Debian bullseye package"
-
-show-variables:
-  stage: startup
-  script:
-    - echo $CI_BUILDS_DIR
-    - echo $CI_PROJECT_DIR
-    - echo $DOCKER_DEB_PACKAGE_BUILDER
-
-build-debian-package:
-  stage: build-deb
-  image:
-    name: $DOCKER_DEB_PACKAGE_BUILDER:bullseye
-    entrypoint: ["/bin/bash"]
-  script: |-
-    RUN_LINTIAN=YES BUILD_DIRECTORY=$CI_PROJECT_DIR /root/build-pkg.sh

.gitlab-ci-buster.yml

-# Build a buster Debian package
-stages:
-  - startup
-  - build-deb
-
-variables:
-  # DOCKER_DEB_PACKAGE_BUILDER: this is the name of the
-  # of the Docker image that builds the Debian package. There should
-  # be little reason to change this value.
-  DOCKER_DEB_PACKAGE_BUILDER: macrotex/debian-package-docker
-
-init-message:
-  stage: startup
-  script:
-    - echo "building Debian buster package"
-
-show-variables:
-  stage: startup
-  script:
-    - echo $CI_BUILDS_DIR
-    - echo $CI_PROJECT_DIR
-    - echo $DOCKER_DEB_PACKAGE_BUILDER
-
-build-debian-package:
-  stage: build-deb
-  image:
-    name: $DOCKER_DEB_PACKAGE_BUILDER:buster
-    entrypoint: ["/bin/bash"]
-  script: |-
-    RUN_LINTIAN=YES BUILD_DIRECTORY=$CI_PROJECT_DIR /root/build-pkg.sh

.gitlab-ci-sid.yml

-# Build a sid Debian package
-stages:
-  - startup
-  - build-deb
-
-variables:
-  # DOCKER_DEB_PACKAGE_BUILDER: this is the name of the
-  # of the Docker image that builds the Debian package. There should
-  # be little reason to change this value.
-  DOCKER_DEB_PACKAGE_BUILDER: macrotex/debian-package-docker
-
-init-message:
-  stage: startup
-  script:
-    - echo "building Debian sid package"
-
-show-variables:
-  stage: startup
-  script:
-    - echo $CI_BUILDS_DIR
-    - echo $CI_PROJECT_DIR
-    - echo $DOCKER_DEB_PACKAGE_BUILDER
-
-build-debian-package:
-  stage: build-deb
-  image:
-    name: $DOCKER_DEB_PACKAGE_BUILDER:sid
-    entrypoint: ["/bin/bash"]
-  script: |-
-    RUN_LINTIAN=YES BUILD_DIRECTORY=$CI_PROJECT_DIR /root/build-pkg.sh