Don't retry on failure

As we're just starting out using CI, it is especially important to be
aware of any failure, so that we can fix it.

Such a workaround can be added later in case it is deemed necessary.

debian/salsa-ci.yml

@@ -10,9 +10,6 @@ variables:
 build-yamls:
   stage: build
   image: $BASE_CI_IMAGES:unstable
-  retry:
-    max: 2
-    when: always
   only:
     - branches
     - master # I suppose that we can work directly on master