Eliminate dependency to formatv(). NFC.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@344212 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/COFF/DriverUtils.cpp b/COFF/DriverUtils.cpp
index 9bb8348..3a11895 100644
--- a/COFF/DriverUtils.cpp
+++ b/COFF/DriverUtils.cpp
@@ -28,7 +28,6 @@
 #include "llvm/Option/Option.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FileUtilities.h"
-#include "llvm/Support/FormatVariadic.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/Process.h"
 #include "llvm/Support/Program.h"
@@ -864,8 +863,9 @@
 }
 
 void printHelp(const char *Argv0) {
-  std::string Usage = formatv("{0} [options] file...", Argv0).str();
-  COFFOptTable().PrintHelp(outs(), Usage.c_str(), "LLVM Linker", false);
+  COFFOptTable().PrintHelp(outs(),
+                           (std::string(Argv0) + " [options] file...").c_str(),
+                           "LLVM Linker", false);
 }
 
 } // namespace coff