Removing Google Account on the phone will erase all of your data.
All described operations you are doing at your own risk.
If want saves your data do a backup before start.
The battery should be at least 50% charged before the start.
Google Account Protection Bypass Manual
Turn on your LG G6 H870 and select your language.
Connect to a wifi network.
Go back to the first page welcome screen.
Tap on Accessibility button.
Turn on TalkBack toggle button.
Write on screen L letter to enable help menu.
Select TalkBack Settings.
Hold together volume up and volume down button until you hear talkback suspended then release it.