Unrooting and re-locking bootloader?

[ethantownley]

Is there any way I can unroot my G4 and re-lock the bootloader (fully, removing the message), after doing it I realise I might not get OTA updates and the reason I rooted in the first place is no longer needed. Thanks

 

[xtermmin]

Is there any way I can unroot my G4 and re-lock the bootloader (fully, removing the message), after doing it I realise I might not get OTA updates and the reason I rooted in the first place is no longer needed. Thanks

Reflash stock firmware via fastboot, then issue command "fastboot oem lock", although it'll change the bootloader state to "relocked" instead of the factory "locked".