lang/julia: unbrake after update of math/suitesparse-cholmod

Looks like julia is incompatible with the latest version of suitesparse-cholmod.
suitesparse is an optional dependency so remove it for now and will
add it back when a version of julia that is compatible with it is
released.

PR: 268025
Reported by: rizor.reardon@yahoo.com (maintainer)