When there are no (other) lessons in a course, the single course page still generates the html for the title and content of the list. That is not only redundant, but also a problem when the title is getting prefixed by a filter.

In that case it is left to the filter not to prefix the empty title and make the existence of the empty title visible. When it doesn't (what it might not) a title is shown with only the prefix and no content below it. When there is no content (lessons outside of modules), there is no need for a title and a content wrapper.

Steps to Reproduce

1. Go to a single course page of a course without lessons '/course/{course-slug}/'
2. Inspect the html

What I Expected

No .course-lessons section and no header title of that section when there are no lessons to show.

What Happened Instead

Below the .entry section the following html is added:

<header>
    <h2>
    </h2>
</header>
<section class="course-lessons">
</section>