[jQuery] Modifying jQuery to decrease file size.

I'm currently using about one third of the jQuery library and I'm
wondering if I can safely remove unused functions that are not being
internally called nor called by my code in an effort to reduce
filesize further.
I realize that minified and gzipped its already small, but when there
may be millions of downloads a day...i need it small. :)
thoughts?
regards,
paul