1. Go to the workshop page, and click the unsubscribe button.
2. Right click gmod in your steam libary, click properties and "browse local files"
3. Navigate to the file where all the addon GMA's are stored, should be called addons.
4. Delete "death view"
This will actually remove it from the system and susbscriptions, you dont need to reinstall gmod legs or any ♥♥♥♥. Please tell me if it works, as it did for me.