ISSUE-7743: Clean up code

Author: Naragod

spec/models/grouping_spec.rb

@@ -45,13 +45,13 @@
     context 'hidden students' do
       let(:hidden) { create(:student, hidden: true) }
 
-      it 'can be invited (ISSUE-7743)' do
+      it 'can be invited' do
         grouping.invite(hidden.user.user_name, StudentMembership::STATUSES[:accepted], invoked_by_instructor: true)
         expect(grouping.memberships.count).to eq(1)
         expect(grouping.memberships.first.role).to eq(hidden)
       end
 
-      it 'can be added (ISSUE-7743)' do
+      it 'can be added' do
         result = grouping.add_member(hidden)
         expect(result).not_to be_nil
         expect(grouping.memberships.count).to eq(1)