much appreciate your reply. I will look it up now.SafeA9LHInstaller should be able to uninstall it.
Be sure sysnand is on 9.2 or below if you want to keep CFW access.

Did you using OTPless (No 2.1 Downgrade when install A9LH) or OTP (Need 2.1 Downgrade when install A9LH)?
If OTPless
If OTP
- Download SafeA9LHInstaller 2.5.1 : https://github.com/AuroraWright/SafeA9LHInstaller/releases/tag/v2.5.1
- Follow step 4 and 8 - 9 in this guide : https://github.com/Plailect/Guide/wiki/Updating-A9LH
- Select Remove A9LH Option
And, as @metroid maniac said, you should keep your SysNAND on 9.2.
- Download SafeA9LHInstaller 2.0.3 : https://github.com/AuroraWright/SafeA9LHInstaller/releases/tag/v2.0.3
- Follow step 4 and 8 - 9 in this guide : https://github.com/Plailect/Guide/wiki/Updating-A9LH
- Select Remove A9LH Option
