You can remove a quiz from a collection as easily as adding one to a collection. Please follow the steps below to know how to go about removing a quiz.
Step 1: Access your collections from My Quizizz section as shown below.
Step 2: Click on the collection from which you want to remove quiz.
Step 3: Click on the remove button to remove the quiz from your collection.
On clicking the remove button, the quiz gets deleted as shown in the image above.