Revert "HACK: Add some debug helpers"

This reverts commit 365a7ed8448fd2da1f33c41d1b28cdbf4cb475ec.
[build] For now always export our env vars on Wrench

Wrench currently exports a broken DYLD_FALLBACK_LIBRARY_PATH. Since
we now rely on this either exported with valid values or not exported
at all, this breaks our build.