[PECOFF] Removed unnecessary namespace qualifier.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@184649 91177308-0d34-0410-b5e6-96231b3b80d8
Fix unused field warning.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@184651 91177308-0d34-0410-b5e6-96231b3b80d8