Danger job incorrectly flags removal of feature flag patch files without changelogs

We can automate the removal of a feature flag by using a .patch file with the same name as the yaml file describing the flag.

https://docs.gitlab.com/ee/development/feature_flags/#optionally-add-a-patch-file-for-automated-removal-of-feature-flags

If you remove the patch file danger incorrectly rejects the push or fails the danger job when the commit does not include a changelog entry.

Sometimes it is messy having a patch file so we may opt for removal. This shouldn't prevent merges from happening.