Remove dead include.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184939 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/arcmt-test/arcmt-test.cpp b/tools/arcmt-test/arcmt-test.cpp
index 0a5bbe8..50426e3 100644
--- a/tools/arcmt-test/arcmt-test.cpp
+++ b/tools/arcmt-test/arcmt-test.cpp
@@ -15,7 +15,6 @@
 #include "clang/Lex/Preprocessor.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/PathV1.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/system_error.h"