More EE->CE fixes

app/controllers/concerns/todos_actions.rb

 module TodosActions
-  include Gitlab::Utils::StrongMemoize
   extend ActiveSupport::Concern
 
   def create

app/controllers/projects/todos_controller.rb

 class Projects::TodosController < Projects::ApplicationController
+  include Gitlab::Utils::StrongMemoize
   include TodosActions
 
   before_action :authenticate_user!, only: [:create]

app/helpers/todos_helper.rb

@@ -169,9 +169,7 @@ module TodosHelper
   end
 
   def todo_group_options
-    groups = current_user.authorized_groups
-
-    groups = groups.map do |group|
+    groups = current_user.authorized_groups.map do |group|
       { id: group.id, text: group.full_name }
     end
 

app/models/todo.rb

@@ -83,7 +83,7 @@ class Todo < ActiveRecord::Base
   end
 
   def parent
-    project || group
+    project
   end
 
   def unmergeable?

app/services/todo_service.rb

@@ -285,7 +285,6 @@ class TodoService
   def attributes_for_target(target)
     attributes = {
       project_id: target&.project&.id,
-      group_id: target.respond_to?(:group) ? target.group_id : nil,
       target_id: target.id,
       target_type: target.class.name,
       commit_id: nil