remove hack breaking some cross compile builds. if you really need this, you should be using new enough glibc anyways

src/switch_time.c

@@ -35,16 +35,9 @@
 #include <stdio.h>
 #include "private/switch_core_pvt.h"
 
-#ifdef TIMERFD_WRAP
-#include <timerfd_wrap.h>
-#ifndef HAVE_TIMERFD_CREATE
-#define HAVE_TIMERFD_CREATE
-#endif
-#else
 #ifdef HAVE_TIMERFD_CREATE
 #include <sys/timerfd.h>
 #endif
-#endif
 
 //#if defined(DARWIN)
 #define DISABLE_1MS_COND