Remove unused argument.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81010 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 9dac779..e9b59f5 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -120,7 +120,7 @@
     case Action::AssembleJobClass:
       T = new tools::darwin::Assemble(*this); break;
     case Action::LinkJobClass:
-      T = new tools::darwin::Link(*this, MacosxVersionMin.c_str()); break;
+      T = new tools::darwin::Link(*this); break;
     case Action::LipoJobClass:
       T = new tools::darwin::Lipo(*this); break;
     }