1 files changed, 0 insertions, 76 deletions
diff --git a/lib/gitlab/background_migration/merge_topics_with_same_name.rb b/lib/gitlab/background_migration/merge_topics_with_same_name.rb
deleted file mode 100644
index 07231098a5f..00000000000
--- a/lib/gitlab/background_migration/merge_topics_with_same_name.rb
+++ /dev/null
@@ -1,76 +0,0 @@
-# frozen_string_literal: true
-
-module Gitlab
-  module BackgroundMigration
-    # The class to merge project topics with the same case insensitive name
-    class MergeTopicsWithSameName
-      # Temporary AR model for topics
-      class Topic < ActiveRecord::Base
-        self.table_name = 'topics'
-      end
-
-      # Temporary AR model for project topic assignment
-      class ProjectTopic < ActiveRecord::Base
-        self.table_name = 'project_topics'
-      end
-
-      def perform(topic_names)
-        topic_names.each do |topic_name|
-          topics = Topic.where('LOWER(name) = ?', topic_name)
-            .order(total_projects_count: :desc, non_private_projects_count: :desc, id: :asc)
-            .to_a
-          topic_to_keep = topics.shift
-          merge_topics(topic_to_keep, topics) if topics.any?
-        end
-      end
-
-      private
-
-      def merge_topics(topic_to_keep, topics_to_remove)
-        description = topic_to_keep.description
-
-        topics_to_remove.each do |topic|
-          description ||= topic.description if topic.description.present?
-          process_avatar(topic_to_keep, topic) if topic.avatar.present?
-
-          ProjectTopic.transaction do
-            ProjectTopic.where(topic_id: topic.id)
-              .where.not(project_id: ProjectTopic.where(topic_id: topic_to_keep).select(:project_id))
-              .update_all(topic_id: topic_to_keep.id)
-            ProjectTopic.where(topic_id: topic.id).delete_all
-          end
-        end
-
-        Topic.where(id: topics_to_remove).delete_all
-
-        topic_to_keep.update(
-          description: description,
-          total_projects_count: total_projects_count(topic_to_keep.id),
-          non_private_projects_count: non_private_projects_count(topic_to_keep.id)
-        )
-      end
-
-      # We intentionally use application code here because we need to copy/remove avatar files
-      def process_avatar(topic_to_keep, topic_to_remove)
-        topic_to_remove = ::Projects::Topic.find(topic_to_remove.id)
-        topic_to_keep = ::Projects::Topic.find(topic_to_keep.id)
-        unless topic_to_keep.avatar.present?
-          topic_to_keep.avatar = topic_to_remove.avatar
-          topic_to_keep.save!
-        end
-
-        topic_to_remove.remove_avatar!
-        topic_to_remove.save!
-      end
-
-      def total_projects_count(topic_id)
-        ProjectTopic.where(topic_id: topic_id).count
-      end
-
-      def non_private_projects_count(topic_id)
-        ProjectTopic.joins('INNER JOIN projects ON project_topics.project_id = projects.id')
-            .where(project_topics: { topic_id: topic_id }).where('projects.visibility_level in (10, 20)').count
-      end
-    end
-  end
-end