Reset PIN from adb shell I have forgotten the PIN of a device but I do have access to a root shell with adb shell and su 

Is there some way I could remove the screen PIN lock or change it?
if your device is not encrypted with login credentials you can delete locksettings.db  

adb shell su -c "rm /data/system/locksettings.db*"


However, bear in mind the following files are required for FBE encryption. If you delete these files you won't be able to decrypt userdata partition, all data is lost  

/data/system/gatekeeper.password.key
/data/system/gatekeeper.pattern.key
/data/system/locksettings.db
/data/system/locksettings.db-shm
/data/system/locksettings.db-wal