diff --git a/module/os/freebsd/zfs/zfs_onexit_os.c b/module/os/freebsd/zfs/zfs_onexit_os.c
deleted file mode 100644
index 8b22f2fdc3b3..000000000000
--- a/module/os/freebsd/zfs/zfs_onexit_os.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-/*
- * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2013 by Delphix. All rights reserved.
- */
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/errno.h>
-#include <sys/kmem.h>
-#include <sys/sunddi.h>
-#include <sys/zfs_ioctl.h>
-#include <sys/zfs_onexit.h>
-
-static int
-zfs_onexit_minor_to_state(minor_t minor, zfs_onexit_t **zo)
-{
-	*zo = zfsdev_get_state(minor, ZST_ONEXIT);
-	if (*zo == NULL)
-		return (SET_ERROR(EBADF));
-
-	return (0);
-}
-
-int
-zfs_onexit_fd_hold(int fd, minor_t *minorp)
-{
-	file_t *fp, *tmpfp;
-	zfs_onexit_t *zo;
-	void *data;
-	int error;
-
-	if ((error = zfs_file_get(fd, &fp)))
-		return (error);
-
-	tmpfp = curthread->td_fpop;
-	curthread->td_fpop = fp;
-	error = devfs_get_cdevpriv(&data);
-	if (error == 0)
-		*minorp = (minor_t)(uintptr_t)data;
-	curthread->td_fpop = tmpfp;
-	if (error != 0)
-		return (SET_ERROR(EBADF));
-	return (zfs_onexit_minor_to_state(*minorp, &zo));
-}
-
-void
-zfs_onexit_fd_rele(int fd)
-{
-	zfs_file_put(fd);
-}