Revert "databases/mongodb70: Fix build with llvm16"

This reverts commit 4a6a3534dde02d293438a929e06950c64a71a33d.

There was a build failure in my local build instance but this was a
false positive and actually this ports build fine without the changes.

Reported by: fuz
Approved by: portmgr (blanket)
Sponsored by: The FreeBSD Foundation