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

[Chandler Carruth]

  Just a comment from the peanut gallery, but I don't really see what's better about having to remember in each place to add the atom to a vector, and then add the entire vector later... Maybe it is better if all of the atoms already have to get added to the vector?

  It also seems better to add atoms as-you-go if only for locality and avoiding walking the data structures twice.

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