You can hide it, but it's not easy to explain. The Object initialization rules can make all of these have default values so the code creating the object is at least supplied a default value. Once you have configured that, it might be possible to edit the JSP JCA code to hide those rows of the form without the system complaining that it cannot find a value. I have not tried it. At a minimum, there are two steps to get it to work.
It sounds like you are new to using/configuring Windchill?
If so, you have some reading to do to learn about these two steps in the Business Admin Guide and Customizer's Guide - or hire a consultant. I am sure others on here might have time to help you with this, but it would be good for you to understand what is going on so we can more easily coach you thru the steps.
Best by far also to try (a lot) to work with the system as supplied and then decide what to configure / customize. This is not saying that the system is "right" as supplied, but the effects of changing things take quite a lot of effort to really think thru and understand.