Remove unnecessary "pending" comment

The test is already working with poll question answers (which are the
only ones using `has_many_images`) as well.

spec/shared/system/nested_imageable.rb

@@ -186,13 +186,9 @@ shared_examples "nested imageable" do |imageable_factory_name, path, imageable_p
       click_on submit_button
       imageable_redirected_to_resource_show_or_navigate_to(imageable)
 
-      if has_many_images
-        # Pending. Review soon and test
-      else
       expect(page).to have_selector "figure img"
       expect(page).to have_selector "figure figcaption" if show_caption_for?(imageable_factory_name)
     end
-    end
 
     scenario "Different URLs for different images" do
       do_login_for user, management: management