unused, added for softdep

diff --git sys/kern/vfs_subr.c sys/kern/vfs_subr.c
index 41c73c797e6..9dcdae0c6f5 100644
--- sys/kern/vfs_subr.c
+++ sys/kern/vfs_subr.c
@@ -2225,18 +2225,6 @@ reassignbuf(struct buf *bp)
 	bufinsvn(bp, listheadp);
 }
 
-/*
- * Check if vnode represents a disk device
- */
-int
-vn_isdisk(struct vnode *vp, int *errp)
-{
-	if (vp->v_type != VBLK && vp->v_type != VCHR)
-		return (0);
-
-	return (1);
-}
-
 #ifdef DDB
 #include <machine/db_machdep.h>
 #include <ddb/db_interface.h>
diff --git sys/sys/vnode.h sys/sys/vnode.h
index 23eebf37146..d06901f8d85 100644
--- sys/sys/vnode.h
+++ sys/sys/vnode.h
@@ -642,7 +642,6 @@ void	vn_initialize_syncerd(void);
 void	vn_syncer_add_to_worklist(struct vnode *, int);
 
 /* misc */
-int	vn_isdisk(struct vnode *, int *);
 int 	getvnode(struct proc *, int, struct file **);
 
 /* uvm */