ptrace: Drop unneeded #includes

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

ptrace.c

@@ -7,31 +7,17 @@
 #include <stdbool.h>
 #include <limits.h>
 #include <signal.h>
-#include <limits.h>
-#include <unistd.h>
-#include <dirent.h>
-
-#include <fcntl.h>
 
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/ptrace.h>
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/wait.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <sys/vfs.h>
-#include <sys/user.h>
 
 #include "compiler.h"
 #include "types.h"
 #include "util.h"
 #include "ptrace.h"
 
-#include "crtools.h"
-
 int unseize_task(pid_t pid)
 {
 	return ptrace(PTRACE_DETACH, pid, NULL, NULL);