Use the changelog rule from `gitlab-dangerfiles`

The rule was introduced in
https://gitlab.com/gitlab-org/ruby/gems/gitlab-dangerfiles/-/releases/v2.9.0

Signed-off-by: Rémy Coutable <remy@rymai.me>

1 files changed, 0 insertions, 91 deletions

diff --git a/danger/rules/changelog/Dangerfile b/danger/rules/changelog/Dangerfile
deleted file mode 100644
index e1079b78a..000000000
--- a/danger/rules/changelog/Dangerfile
+++ /dev/null
@@ -1,91 +0,0 @@
-require 'yaml'
-
-def lint_commit(commit)
-  trailer = commit.message.match(/^(?<name>Changelog):\s*(?<category>.+)$/i)
-
-  return :missing if trailer.nil? || trailer[:category].nil?
-
-  name = trailer[:name]
-
-  unless name == 'Changelog'
-    self.fail(
-      "The changelog trailer for commit #{commit.sha} must be `Changelog` (starting with a capital C), not `#{name}`"
-    )
-
-    return :invalid
-  end
-
-  category = trailer[:category]
-
-  return :valid if CATEGORIES.include?(category)
-
-  self.fail(
-    "Commit #{commit.sha} uses an invalid changelog category: #{category}"
-  )
-
-  :invalid
-end
-
-def presented_no_changelog_labels
-  NO_CHANGELOG_LABELS.map { |label| %(~"#{label}") }.join(', ')
-end
-
-NO_CHANGELOG_LABELS = [
-  'documentation',
-  'type::tooling',
-  'tooling::pipelines',
-  'tooling::workflow',
-  'ci-build',
-  'meta'
-].freeze
-
-CATEGORIES = YAML
-  .load_file(File.expand_path('../../../.gitlab/changelog_config.yml', __dir__))
-  .fetch('categories')
-  .keys
-  .freeze
-
-SEE_DOC = "See [the documentation](https://docs.gitlab.com/ee/development/changelog.html).".freeze
-
-CHANGELOG_MISSING = <<~MSG.freeze
-**[CHANGELOG missing](https://docs.gitlab.com/ee/development/changelog.html).**
-
-To ceate a changelog, annotate one or more commits with the `Changelog` Git
-trailer. If you want to annotate the latest commit, you can do so using `git
-commit --amend`. If you want to annotate older or multiple commits, you need to
-do so using `git rebase -i`.
-
-When adding the trailer, you can use the following values:
-
-- #{CATEGORIES.join("\n- ")}
-
-For example:
-
-```
-This is the subject of your commit.
-
-This would be the body of your commit containing some extra details.
-
-Changelog: added
-```
-
-If your merge request doesn't warrant a CHANGELOG entry, consider adding any of
-the #{presented_no_changelog_labels} labels.
-
-#{SEE_DOC}
-MSG
-
-changelog_needed = (gitlab.mr_labels & NO_CHANGELOG_LABELS).empty?
-
-if changelog_needed
-  checked = 0
-
-  git.commits.each do |commit|
-    case lint_commit(commit)
-    when :valid, :invalid
-      checked += 1
-    end
-  end
-
-  warn(CHANGELOG_MISSING) if checked.zero?
-end