parasite: Remove unneeded headers from parasite.c

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/parasite.h

@@ -11,8 +11,6 @@
 #include <sys/un.h>
 
 #include "image.h"
-#include "sockets.h"
-
 #include "util-net.h"
 
 #include "../protobuf/vma.pb-c.h"

parasite.c

 #include <sys/mman.h>
+#include <errno.h>
+#include <signal.h>
 
 #include "syscall.h"
 #include "parasite.h"
-#include "util.h"
 
 #include <string.h>