Header cleanup

src/xenia/base/threading_posix.cc

@@ -17,15 +17,11 @@
 #include <pthread.h>
 #include <sched.h>
 #include <signal.h>
-#include <sys/eventfd.h>
 #include <sys/syscall.h>
-#include <sys/time.h>
-#include <sys/types.h>
 #include <unistd.h>
 #include <array>
 #include <cstddef>
 #include <ctime>
-#include <memory>
 
 #include "logging.h"