danger: Remove duplicate roulette rule

Since we have upgraded gitlab-dangerfiles in 9f152be50 (danger: Update
gitlab-dangerfiles gem, 2021-12-07) we always see duplicate roulette
runs in merge requests. This is because the update also included a new
default roulette implementation, which implements roughly the same logic
as we have.

Remove our own roulette rule to avoid the duplication.

1 files changed, 0 insertions, 74 deletions

diff --git a/danger/rules/roulette/Dangerfile b/danger/rules/roulette/Dangerfile
deleted file mode 100644
index 80ee666df..000000000
--- a/danger/rules/roulette/Dangerfile
+++ /dev/null
@@ -1,74 +0,0 @@
-# frozen_string_literal: true
-
-MESSAGE = <<MARKDOWN
-## Reviewer roulette
-
-Changes that require review have been detected! A merge request is normally
-reviewed by both a reviewer and a maintainer in its primary category and by a
-maintainer in all other categories.
-MARKDOWN
-
-CATEGORY_TABLE_HEADER = <<MARKDOWN
-
-To spread load more evenly across eligible reviewers, Danger has picked a candidate for each
-review slot. Feel free to
-[override these selections](https://about.gitlab.com/handbook/engineering/projects/#gitaly)
-if you think someone else would be better-suited
-or use the [GitLab Review Workload Dashboard](https://gitlab-org.gitlab.io/gitlab-roulette/) to find other available reviewers.
-
-To read more on how to use the reviewer roulette, please take a look at the
-[Engineering workflow](https://about.gitlab.com/handbook/engineering/workflow/#basics)
-and [code review guidelines](https://docs.gitlab.com/ee/development/code_review.html).
-Please consider assigning a reviewer or maintainer who is a
-[domain expert](https://about.gitlab.com/handbook/engineering/projects/#gitaly) in the area of the merge request.
-
-Once you've decided who will review this merge request, mention them as you
-normally would! Danger does not automatically notify them for you.
-
-| Category | Reviewer | Maintainer |
-| -------- | -------- | ---------- |
-MARKDOWN
-
-OPTIONAL_REVIEW_TEMPLATE = '%{role} review is optional for %{category}'
-NOT_AVAILABLE_TEMPLATE = 'No %{role} available'
-
-def note_for_spins_role(spins, role)
-  spins.each do |spin|
-    note = note_for_spin_role(spin, role)
-
-    return note if note
-  end
-
-  NOT_AVAILABLE_TEMPLATE % { role: role }
-end
-
-def note_for_spin_role(spin, role)
-  if spin.optional_role == role
-    return OPTIONAL_REVIEW_TEMPLATE % { role: role.capitalize, category: helper.label_for_category(spin.category) }
-  end
-
-  spin.public_send(role)&.markdown_name(author: roulette.team_mr_author) # rubocop:disable GitlabSecurity/PublicSend
-end
-
-def markdown_row_for_spins(category, spins_array)
-  reviewer_note = note_for_spins_role(spins_array, :reviewer)
-  maintainer_note = note_for_spins_role(spins_array, :maintainer)
-
-  "| #{helper.label_for_category(category)} | #{reviewer_note} | #{maintainer_note} |"
-end
-
-changes = project_helper.changes_by_category
-
-if changes.any?
-  categories = changes.keys
-  project = project_helper.project_name
-
-  random_roulette_spins = roulette.spin(project, [nil], timezone_experiment: false)
-
-  rows = random_roulette_spins.map do |spin|
-    markdown_row_for_spins(spin.category, [spin])
-  end
-
-  markdown(MESSAGE)
-  markdown(CATEGORY_TABLE_HEADER + rows.join("\n")) unless rows.empty?
-end