[ELF] Remove FIXME(s) that are already fixed.
[ELF] Remove FIXME(s) that are already fixed.

FIXME code was left around in few places where its already been taken care of.

This removes the FIXME's that are not needed.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@230139 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld