ELF2: Remove unused global variable.
ELF2: Remove unused global variable.

A global variable "Driver" is to re-entry to the driver to parse a
.drectve section. Because the need is COFF-specific, we don't need
this variable for ELF.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@244680 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld