setpgrp.c: remove unneeded header

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/sysdeps/linux/common/setpgrp.c

@@ -4,10 +4,8 @@
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  */
 
-#include <syscall.h>
 #include <unistd.h>
 
-
 int setpgrp(void)
 {
 	return setpgid(0,0);