Remove unused variable which was leaking memory, and while here remove 2 other

variables that were also never used
OK otto@

src/usr.sbin/ntpd/ntpd.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: ntpd.c,v 1.111 2016/09/26 17:17:01 rzalamena Exp $ */
+/*	$OpenBSD: ntpd.c,v 1.112 2016/12/01 16:24:48 mestre Exp $ */
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -118,9 +118,6 @@ main(int argc, char *argv[])
 	u_int			 pfd_elms = 0, new_cnt;
 	struct constraint	*cstr;
 	struct passwd		*pw;
-	const char		*pw_dir;
-	uid_t			pw_uid;
-	gid_t			pw_gid;
 	void			*newp;
 	int			argc0 = argc;
 	char			**argv0 = argv;
@@ -206,10 +203,6 @@ main(int argc, char *argv[])
 		fatalx("%s: process '%s' failed", __func__, pname);
 	}
 
-	pw_dir = strdup(pw->pw_dir);
-	pw_uid = pw->pw_uid;
-	pw_gid = pw->pw_gid;
-
 	if (setpriority(PRIO_PROCESS, 0, -20) == -1)
 		warn("can't set priority");