Forcefully Remove MDM from Mac

Reboot into Recovery Mode

Open Terminal and run csrutil disable then reboot. This disables System Integrity Protection.

After reboot, move the configuration profiles directory: mv /var/db/ConfigurationProfiles /var/db/ConfigurationProfiles.old

Or destroy it: rm -rf /var/db/ConfigurationProfiles

Then recreate it mkdir /var/db/ConfigurationProfiles

Reboot back into Recovery Mode and re-enable System Integrity Protection.

Open Terminal and run csrutil enable then reboot.

Reboot into normal operation and enroll the Mac into the MDM as normal.