libc: Ansify again, de-register again.

* Remove all the K&R crap that was carelessly copied over our ansified
  source in the so called locale "sync" (0d5acd7467c4e95).

* Also remove a lot of old unused gunk in stdtime/ again that had already
  been removed. We really don't want it back.

* De-register again (while here, do that in resolv/ too).