You can now archive and unarchive test cases in the test library. This gives you the freedom to remove unwanted test cases from the test library without permanently deleting the data.
Simply select the desired test case and click Archive. All archived test cases are visible in the Archived section at the bottom of the left-hand sidebar, where the folders are located.
You can unarchive these test cases at any time by selecting, then clicking Unarchive.
See Working with Test Cases for more information!
Archived Test Cases: