It is important to remove the baseboard when you are installing laminate for a several reasons. With laminate, you are not going to be adhering anything to the floor. That means you need to put the baseboards over the laminate to hold it in place.
Adequate Work Space
You need room to work with the laminate, as it will be snapping together before going on the floor. You must put the baseboards on top of the laminate once you are finished. That way, you can put the baseboards directly on the laminate without a gap.