ci: mergify: update for Travis, remove Codacy (#2627)

* ci: mergify: remove Codacy from required checks

It might be hanging, and is not really valuable enough currently to
require a rebuild etc.

* ci: mergify: rename check for Travis CI

It was moved from travis-ci.org to travis-ci.com.

.mergify.yml

@@ -3,8 +3,7 @@ pull_request_rules:
     conditions:
       - label!=no-mergify
       - '#approved-reviews-by>=2'
-      - status-success=continuous-integration/travis-ci/pr
+      - status-success=Travis CI - Pull Request
-      - status-success=Codacy/PR Quality Review
       - status-success=codecov/patch
       - status-success=coverage/coveralls
     actions: