Drop more-advanced covert "reports:" integration; I think this requires GitLab EE.

.gitlab-ci.yml

@@ -13,15 +13,11 @@ stages:
     - apt-get -q -y --solver aspcud -o APT::Solver::Strict-Pinning=0
         -o Debug::pkgProblemResolver=yes build-dep .
     - apt-get -q -y install --no-install-recommends radare2 || true
-    - py.test-3 -vv -l -r a --cov=diffoscope --cov-report=term-missing --cov-report xml --cov-report html
+    - py.test-3 -vv -l -r a --cov=diffoscope --cov-report=term-missing --cov-report html
   coverage: '/(?i)total.*? (100(?:\.0+)?\%|[1-9]?\d(?:\.\d+)?\%)$/'
   artifacts:
     paths:
       - htmlcov/*
-    reports:
-      coverage_report:
-        coverage_format: cobertura
-        path: coverage.xml
 
 unstable:
   <<: *test