Drop ubuntu/impish and debian/stretch

.gitlab-ci.yml

@@ -84,23 +84,6 @@ upload/debian/buster:
   dependencies:
   - build/debian/buster
 
-build/debian/stretch:
-  <<: *build
-  variables:
-    DOCKER_IMAGE: debian/stretch
-
-test/debian/stretch:
-  <<: *test
-  variables:
-    DOCKER_IMAGE: debian/stretch
-  dependencies:
-  - build/debian/stretch
-
-upload/debian/stretch:
-  <<: *upload
-  dependencies:
-  - build/debian/stretch
-
 ###################################
 # Ubuntu
 ###################################
@@ -121,23 +104,6 @@ upload/ubuntu/jammy:
   dependencies:
   - build/ubuntu/jammy
 
-build/ubuntu/impish:
-  <<: *build
-  variables:
-    DOCKER_IMAGE: ubuntu/impish
-
-test/ubuntu/impish:
-  <<: *test
-  variables:
-    DOCKER_IMAGE: ubuntu/impish
-  dependencies:
-  - build/ubuntu/impish
-
-upload/ubuntu/impish:
-  <<: *upload
-  dependencies:
-  - build/ubuntu/impish
-
 build/ubuntu/focal:
   <<: *build
   variables: