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/Tools.h b/lib/Driver/Tools.h
index 618aced..67e25f6 100644
--- a/lib/Driver/Tools.h
+++ b/lib/Driver/Tools.h
@@ -201,15 +201,11 @@
     void AddDarwinSubArch(const ArgList &Args, ArgStringList &CmdArgs) const;
     void AddLinkArgs(const ArgList &Args, ArgStringList &CmdArgs) const;
 
-    /// The default macosx-version-min.
-    const char *MacosxVersionMin;
-
     const toolchains::Darwin_X86 &getDarwinToolChain() const;
 
   public:
-    Link(const ToolChain &TC,
-         const char *_MacosxVersionMin) 
-      : Tool("darwin::Link", TC), MacosxVersionMin(_MacosxVersionMin) {
+    Link(const ToolChain &TC)
+      : Tool("darwin::Link", TC) {
     }
 
     virtual bool acceptsPipedInput() const { return false; }