Move bot removal into removeexpiredmembers worker

Instead of making a new worker, move project bot removal logic into
remove expired members worker

app/workers/remove_expired_members_worker.rb

@@ -7,11 +7,19 @@ class RemoveExpiredMembersWorker # rubocop:disable Scalability/IdempotentWorker
   feature_category :authentication_and_authorization
   worker_resource_boundary :cpu
 
+  # rubocop: disable CodeReuse/ActiveRecord
   def perform
-    Member.expired.find_each do |member|
+    Member.expired.preload(:user).find_each do |member|
       Members::DestroyService.new.execute(member, skip_authorization: true)
+
+      expired_user = member.user
+
+      if expired_user.project_bot?
+        Users::DestroyService.new(nil).execute(expired_user, skip_authorization: true)
+      end
     rescue => ex
       logger.error("Expired Member ID=#{member.id} cannot be removed - #{ex}")
     end
   end
+  # rubocop: enable CodeReuse/ActiveRecord
 end

changelogs/unreleased/267191-project-access-tokens-delete-project-bot-after-it-s-removed-from-p.yml

+---
+title: Project Access Tokens - Delete project bot after token expires
+merge_request: 45828
+author:
+type: fixed

spec/workers/remove_expired_members_worker_spec.rb

@@ -31,6 +31,50 @@ RSpec.describe RemoveExpiredMembersWorker do
       end
     end
 
+    context 'project bots' do
+      let(:project) { create(:project) }
+
+      context 'expired project bot', :sidekiq_inline do
+        let_it_be(:expired_project_bot) { create(:user, :project_bot) }
+
+        before do
+          project.add_user(expired_project_bot, :maintainer, expires_at: 1.day.from_now)
+          travel_to(3.days.from_now)
+        end
+
+        it 'removes expired project bot membership' do
+          expect { worker.perform }.to change { Member.count }.by(-1)
+          expect(Member.find_by(user_id: expired_project_bot.id)).to be_nil
+        end
+
+        it 'deletes expired project bot' do
+          worker.perform
+
+          expect(User.exists?(expired_project_bot.id)).to be(false)
+        end
+      end
+
+      context 'non-expired project bot' do
+        let_it_be(:other_project_bot) { create(:user, :project_bot) }
+
+        before do
+          project.add_user(other_project_bot, :maintainer, expires_at: 10.days.from_now)
+          travel_to(3.days.from_now)
+        end
+
+        it 'does not remove expired project bot that expires in the future' do
+          expect { worker.perform }.to change { Member.count }.by(0)
+          expect(other_project_bot.reload).to be_present
+        end
+
+        it 'does not delete project bot expiring in the future' do
+          worker.perform
+
+          expect(User.exists?(other_project_bot.id)).to be(true)
+        end
+      end
+    end
+
     context 'group members' do
       let_it_be(:expired_group_member) { create(:group_member, expires_at: 1.day.from_now, access_level: GroupMember::DEVELOPER) }
       let_it_be(:group_member_expiring_in_future) { create(:group_member, expires_at: 10.days.from_now, access_level: GroupMember::DEVELOPER) }