Revert "Add test for permanent redirects of descendants"

This reverts commit a2cb9249.

spec/models/route_spec.rb

@@ -75,20 +75,6 @@ describe Route do
           end
         end
       end
-
-      context 'when the group has a subgroup' do
-        let!(:subgroup) { create(:group, parent: group) }
-
-        context 'when path was changed, and then changed back to the original' do
-          # Should this be valid?
-          it 'is valid' do
-            group.update!(path: 'git_lab2')
-            group.path = 'git_lab'
-
-            expect(group.valid?).to be_truthy
-          end
-        end
-      end
     end
   end