Revert "Fix the somehow broken ghc-pkg noisiness patch"
Revert "Fix the somehow broken ghc-pkg noisiness patch"

I've broken this more times than I care to admit. This is the right
thing though: use functions which capture both stdout and stderr.

This reverts commit e37e5a70038a38b6128a10df3dd9dcd02b3f3434.

juhp/stack,juhp/stack