Remove unused argument.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154035 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 94ff5b1..4c1cd39 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1079,7 +1079,7 @@
 /// Objective-C exceptions.
 static void addExceptionArgs(const ArgList &Args, types::ID InputType,
                              const llvm::Triple &Triple,
-                             bool KernelOrKext, bool IsRewriter,
+                             bool KernelOrKext,
                              unsigned objcABIVersion,
                              ArgStringList &CmdArgs) {
   if (KernelOrKext) {
@@ -2364,7 +2364,7 @@
 
   // Add exception args.
   addExceptionArgs(Args, InputType, getToolChain().getTriple(),
-                   KernelOrKext, IsRewriter, objcABIVersion, CmdArgs);
+                   KernelOrKext, objcABIVersion, CmdArgs);
 
   if (getToolChain().UseSjLjExceptions())
     CmdArgs.push_back("-fsjlj-exceptions");