MINOR: pattern: do not assign SMP_TYPES by default to patterns

This is never used since we exit on parse failure, and it's confusing.

src/acl.c

@@ -507,7 +507,6 @@ struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *
 		}
 		pattern->flags = patflags;
 
-		pattern->type = SMP_TYPES; /* unspecified type */
 		ret = expr->pat.parse(args, pattern, NULL, &opaque, err);
 		if (!ret)
 			goto out_free_pattern;

src/pattern.c

@@ -860,7 +860,6 @@ int pattern_register(struct pattern_expr *expr, char *text,
 		(*pattern)->val.tree = &expr->pattern_tree;
 	}
 
-	(*pattern)->type = SMP_TYPES; /* unspecified type by default */
 	if (!expr->parse(args, *pattern, smp, &opaque, err))
 		return -1;