• Remove using of libwhich from build process

It doesn't affect julia work but may cause building proess hang

PR: 231479
Submitted by: Iblis Lin <iblis@hs.ntnu.edu.tw> (maintainer)
Reported by: Trond.Endrestol@ximalas.info
Obtained from: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231479#c9