Remove HAVE_ZPL from commands and libraries

Thanks to the previous few commits we can now build all of the
user space commands and libraries with support for the zpl.

lib/libzfs/libzfs_mount.c

@@ -84,7 +84,6 @@
 #include <sys/systeminfo.h>
 #define	MAXISALEN	257	/* based on sysinfo(2) man page */
 
-#ifdef HAVE_ZPL
 static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *);
 zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **,
     zfs_share_proto_t);
@@ -1343,53 +1342,3 @@ out:
 
 	return (ret);
 }
-
-#else  /* HAVE_ZPL */
-
-int
-zfs_unshare_iscsi(zfs_handle_t *zhp)
-{
-	return 0;
-}
-
-int
-zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags)
-{
-	return 0;
-}
-
-void
-remove_mountpoint(zfs_handle_t *zhp) {
-	return;
-}
-
-boolean_t
-is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where)
-{
-	return B_FALSE;
-}
-
-boolean_t
-zfs_is_mounted(zfs_handle_t *zhp, char **where)
-{
-	return is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where);
-}
-
-boolean_t
-zfs_is_shared(zfs_handle_t *zhp)
-{
-	return B_FALSE;
-}
-
-int
-zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
-{
-	return B_FALSE;
-}
-
-int
-zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
-{
-	return B_FALSE;
-}
-#endif /* HAVE_ZPL */