mergify: OR not supported, therefore we rely on pr-head now only

jenkins hooks are not always present, therefore we can't rely on them.

Author: 0xc0170

.mergify.yml

@@ -140,9 +140,6 @@ pull_request_rules:
       - status-success~=continuous-integration/travis-ci/pr
       # Internal Jenkins - we rely on PR head to provide status
       - status-success~=continuous-integration/jenkins/pr-head
-      # any of the jenkins pipeline needs to be green or not failed (if smart tester skippes some stages, they are not there)
-      - status-success~=^jenkins-ci
-      - -status-failure~=^jenkins-ci
     actions:
       label:
         add: