.gitlab-ci.yml: drop Debian "jessie"

.gitlab-ci.yml

@@ -150,48 +150,6 @@ upload/debian/stretch:
     - debian/stretch:x86_64
     - debian/stretch
 
-# jessie
-debian/jessie:
-  <<: *source
-  variables:
-    DOCKER_IMAGE: debian/jessie
-
-debian/jessie:x86_64:
-  <<: *binary
-  variables:
-    DOCKER_IMAGE: debian/jessie
-  dependencies:
-    - debian/jessie
-
-test/debian/jessie:x86_64:
-  <<: *test
-  variables:
-    DOCKER_IMAGE: debian/jessie
-  dependencies:
-    - debian/jessie
-
-debian/jessie:x86:
-  <<: *binary
-  variables:
-    DOCKER_IMAGE: debian/jessie:x86
-  dependencies:
-    - debian/jessie
-
-test/debian/jessie:x86:
-  <<: *test
-  variables:
-    DOCKER_IMAGE: debian/jessie:x86
-  dependencies:
-    - debian/jessie:x86
-    - debian/jessie:x86_64
-
-upload/debian/jessie:
-  <<: *upload
-  dependencies:
-    - debian/jessie:x86
-    - debian/jessie:x86_64
-    - debian/jessie
-
 ###################################
 # Ubuntu
 ###################################