Revert "try to fix win_sdk build."

A better change was checked into system/core. See commit
941daef629bd571032851edf7ae1dce24266640e

This reverts commit fa99d30ec7.

libs/utils/Threads.cpp

@@ -21,6 +21,7 @@
 #include <utils/Log.h>
 
 #include <cutils/sched_policy.h>
+#include <cutils/properties.h>
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -30,7 +31,6 @@
 #include <unistd.h>
 
 #if defined(HAVE_PTHREADS)
-# include <cutils/properties.h>
 # include <pthread.h>
 # include <sched.h>
 # include <sys/resource.h>