Use simpler version of exists.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185695 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-ar/llvm-ar.cpp b/tools/llvm-ar/llvm-ar.cpp
index 50de10b..5370715 100644
--- a/tools/llvm-ar/llvm-ar.cpp
+++ b/tools/llvm-ar/llvm-ar.cpp
@@ -665,8 +665,7 @@
   ArchiveOperation Operation = parseCommandLine();
 
   // Create or open the archive object.
-  bool Exists;
-  if (llvm::sys::fs::exists(ArchiveName, Exists) || !Exists) {
+  if (!llvm::sys::fs::exists(ArchiveName)) {
     // Produce a warning if we should and we're creating the archive
     if (!Create)
       errs() << argv[0] << ": creating " << ArchiveName << "\n";