munmap.c: do not include unistd.h

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/munmap.c

@@ -8,9 +8,7 @@
  */
 
 #include <sys/syscall.h>
-#include <unistd.h>
 #include <sys/mman.h>
 
-
 _syscall2(int, munmap, void *, start, size_t, length)
 libc_hidden_def(munmap)