Which files would I remove if I wanted to remove all the verbs and grammar, but leave everything else alone?
In I6 or I7? In I7 the verbs are quite strongly tied into everything else, and I imagine lots of things would break if you removed them from the Standard Rules (for example, the rules defined in the I6 templates would no longer have rulebooks to go in).
I haven’t used I6 for years, but if you look at p. 67 of the DM4, you’ll find a template for your source code. It has these lines:
Those would be prime candidates, I suppose.