--- src/util.h.orig	2019-04-21 18:08:50.000000000 -0700
+++ src/util.h	2019-04-21 18:10:53.000000000 -0700
@@ -12,16 +12,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-// OSX 10.9 defaults to libc++ which provides a C++11 <type_traits> header.
-#if defined(__APPLE__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1090
-#define USE_TR1_TYPE_TRAITS
-#endif
-
-#ifdef USE_TR1_TYPE_TRAITS
-#include <tr1/type_traits>  // NOLINT(build/c++tr1)
-#else
 #include <type_traits>  // std::remove_reference
-#endif
 
 namespace node {