How can I deactivate the Headline "Quiz List" at the very to?

Greetings, How can I deactivate the Headline "Quiz List" at the very to?

Hello Mark and thank you for posting.

I suggest changing the Quiz List text by creating a Language Override of the key QUIZ_LIST.
If you want to completely hide it, you can add this CSS to your template's custom.css, or by overriding SimpleQuiz CSS.
Let me know if you need any further assistance!

Thank you very much for your answer Chrtsitopher.
I want to disable completely.
Unfortunally your suggested way doesnt work: Including the css to my template doesnt has an effect - the headline is still displayed:
<div class="componentheading page-header"><h2>Quizliste</h2></div>
Any other ideas?

Found it:

.componentheading.page-header {
display: none;
}

I'm glad you found it!
Please make sure that this CSS does not hide other, potentially useful headers in your site, as these are standard Joomla classes for headers (e.g. in an article or similar items)

Thanks again.