Merge branch 'feature/xenial' into 'master'

Drop Ubuntu Xenial

See merge request !9

.gitlab-ci.yml

@@ -246,45 +246,3 @@ upload/ubuntu/bionic:
     - ubuntu/bionic:x86
     - ubuntu/bionic:x86_64
     - ubuntu/bionic
-
-# xenial
-ubuntu/xenial:
-  <<: *source
-  variables:
-    DOCKER_IMAGE: ubuntu/xenial
-
-ubuntu/xenial:x86_64:
-  <<: *binary
-  variables:
-    DOCKER_IMAGE: ubuntu/xenial
-  dependencies:
-    - ubuntu/xenial
-
-test/ubuntu/xenial:x86_64:
-  <<: *test
-  variables:
-    DOCKER_IMAGE: ubuntu/xenial
-  dependencies:
-    - ubuntu/xenial
-
-ubuntu/xenial:x86:
-  <<: *binary
-  variables:
-    DOCKER_IMAGE: ubuntu/xenial:x86
-  dependencies:
-    - ubuntu/xenial
-
-test/ubuntu/xenial:x86:
-  <<: *test
-  variables:
-    DOCKER_IMAGE: ubuntu/xenial:x86
-  dependencies:
-    - ubuntu/xenial:x86
-    - ubuntu/xenial:x86_64
-
-upload/ubuntu/xenial:
-  <<: *upload
-  dependencies:
-    - ubuntu/xenial:x86
-    - ubuntu/xenial:x86_64
-    - ubuntu/xenial