It is possible to remove the front drive shaft of a 2002 Montero Sport and drive it without it, but it is not recommended. The front drive shaft is responsible for transferring power from the transmission to the front wheels, and without it, the vehicle will only be able to drive in rear-wheel drive. This can make the vehicle more difficult to control, especially in slippery conditions. Additionally, removing the front drive shaft can put extra strain on the transmission and other driveline components, which can lead to premature wear and failure.
If you need to remove the front drive shaft of your 2002 Montero Sport for any reason, it is important to have it done by a qualified mechanic who can ensure that it is done correctly and safely.