While it is sad that you decide not to any longer protect your game with AppSealing security, it is very easy for you to cancel its use.
You simply have to build and release an APK without sealing.
We recommend you to keep the tag in your code. If you decide to apply AppSealing again, with the tag already set, you will be able to seal and publish your APK in no time.
Note: Please make sure that all your end-users update to the un-sealed version of your app. Returned Device from the sealed version are still counted if detected.