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

[Rui Ueyama]

  I don't think that adding atoms to a vector and then add them to the file is much cleaner way than this one... And it wouldn't affect debuggability. As to ordinals, ordinals are not set. Good point. Need to set them. I'll do that in a different patch. Mixing a rollback patch with new code is not a good practice.

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