Revert "[ThinLTO] Add summary entries for index-based WPD"

Mistaken commit of something still under review!

This reverts commit r351453.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351455 91177308-0d34-0410-b5e6-96231b3b80d8
14 files changed