Remove apparently unneeded defines.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@22229 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

tools/trasher.c

@@ -18,10 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#define _XOPEN_SOURCE 600
 #include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
 #include <inttypes.h>
 
 static uint32_t state;