style(course): remove unused lessonplanconcern

concern unused as of a33b8bd

Co-Authored-By: Eko Widianto <42570513+ekowidianto@users.noreply.github.com>

Author: pchunky

app/models/concerns/course/lesson_plan_concern.rb

@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 class Course < ApplicationRecord
-  include Course::LessonPlanConcern
   include Course::SearchConcern
   include Course::DuplicationConcern
   include Course::CourseComponentsConcern

app/models/course.rb

@@ -101,64 +101,6 @@
       end
     end
 
-    describe '#grouped_lesson_plan_items_with_milestones' do
-      let(:course) { create(:course) }
-      let!(:milestones) do
-        [3.days.ago, 2.days.ago, 2.days.from_now].map do |start_at|
-          create(:course_lesson_plan_milestone, course: course, start_at: start_at)
-        end
-      end
-      let!(:lesson_plan_items) do
-        [3.days.ago, 2.days.ago, 1.day.from_now, 3.days.from_now].map do |start_at|
-          create(:course_lesson_plan_item, course: course, start_at: start_at)
-        end
-      end
-      subject { course.grouped_lesson_plan_items_with_milestones }
-
-      context 'when no events fall under a milestone' do
-        let!(:empty_milestone) do
-          create(:course_lesson_plan_milestone, course: course, start_at: 4.days.ago)
-        end
-        it 'does not group any items under that milestone' do
-          expect(subject[empty_milestone]).to be_empty
-        end
-      end
-
-      context 'when no milestones exist' do
-        let!(:milestones) { [] }
-        it 'groups all items under the nil milestone' do
-          expect(subject.length).to eq(1)
-          expect(subject.keys).to eq([nil])
-          expect(subject[nil].each_cons(2).all? { |(a, b)| a.start_at <= b.start_at }).to \
-            be_truthy
-        end
-      end
-
-      context 'when the first milestone comes after the first event' do
-        before do
-          milestone_to_delete = milestones.shift
-          milestone_to_delete.destroy
-        end
-
-        it 'groups all items before the first milestone under the nil milestone' do
-          expect(subject).to have_key(nil)
-          expect(subject[nil]).to contain_exactly(lesson_plan_items.first)
-        end
-      end
-
-      context 'when the first milestone and the first event starts at the same time' do
-        it 'groups the first event under the first milestone' do
-          expect(subject[milestones.first]).to include(lesson_plan_items.first)
-        end
-      end
-
-      context 'when no items exist' do
-        it 'creates the keys for all milestones' do
-          expect(subject.length).to eq(milestones.length)
-        end
-      end
-    end
-
     describe '#staff' do
       let(:course) { create(:course, creator: owner, updater: owner) }
       let(:course_owner) { course.course_users.find_by!(user: owner) }