[libc++] NFC: Remove outdated #if comment

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: d28f69d923a675af696c058747d63213e71e0997
diff --git a/src/chrono.cpp b/src/chrono.cpp
index 2d5f172..9e8a1b3 100644
--- a/src/chrono.cpp
+++ b/src/chrono.cpp
@@ -25,8 +25,8 @@
 #endif
 #else
 #if !defined(CLOCK_REALTIME) || !defined(_LIBCPP_USE_CLOCK_GETTIME)
-#include <sys/time.h>        // for gettimeofday and timeval
-#endif // !defined(CLOCK_REALTIME)
+#include <sys/time.h> // for gettimeofday and timeval
+#endif
 #endif // defined(_LIBCPP_WIN32API)
 
 #if !defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK)