Revert "[CodeView] Hook CodeViewRecordIO for reading/writing symbols."

This reverts commit r289978, which is failing due to some rebase/merge
issues.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289981 91177308-0d34-0410-b5e6-96231b3b80d8
16 files changed