SCRUM#393: Removes configuration files that change the system in an undesirable way and makes minor modifications to the code to avoid undesired operation

Removes configuration files that change the system in an undesirable way:

• 98-proinfo-rural.conf, 95-enable-numlock.conf, 96-disable-guest.conf, 98-xephyr-multi-seat.conf e 99-auto-login.conf: useless for the current solution (it was used by the solution on which we rely)

Makes minor modifications to the code to avoid undesired operation:

• At configurar-multiterminal.sh: remove systemctl restart lightdm because this operation is unnecessary and causes the session to be restarted unintentionally
• In xorg-daemon: returns error when detecting more than one card, because the current solution only accepts one card