Remove unused run_command variants

We don't actually use these va_list based variants of run_command
anymore.  I'm removing them before I make further improvements.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

builtin-push.c

@@ -336,7 +336,7 @@ static int do_push(const char *repo)
 		argv[dest_argc] = NULL;
 		if (verbose)
 			fprintf(stderr, "Pushing to %s\n", dest);
-		err = run_command_v(argv);
+		err = run_command_v_opt(argv, 0);
 		if (!err)
 			continue;
 		switch (err) {