Revert "r193300 - [PassManager] add ReaderWriter{Native, YAML} to the Driver"

The patch have completely broken COFF port and disabled many tests.
This also reverts r193302 (comment fix).

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@193362 91177308-0d34-0410-b5e6-96231b3b80d8