Revert "[llvm-profdata] Add support for weighted merge of profile data"

This reverts commit b7250858d96b8ce567681214273ac0e62713c661.

Reverting in order to investigate Windows test failure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254687 91177308-0d34-0410-b5e6-96231b3b80d8
13 files changed