[PATCH] Revert "[PECOFF] Add atoms to the PassManager file"

[Reid Kleckner]

  LGTM

  Based on https://github.com/llvm-mirror/lld/blob/698309eaa6245de5ca4392f0ca16f591cfae4f43/lib/ReaderWriter/PECOFF/IdataPass.h#L89, it seems pretty clear to me that adding the atoms twice is a bug.  Better to back it out and fix it than to fix forward.

  In general, reverts are considered "safe" and don't need pre-commit review.

http://llvm-reviews.chandlerc.com/D2069

BRANCH
  master

ARCANIST PROJECT
  lld