libzpool: remove unused userspace ioctl policy functions

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Rob Norris <[email protected]>
Closes #17861

Author: robn

include/sys/zfs_context.h

@@ -228,12 +228,6 @@ struct bootstat {
 	uint64_t st_size;
 };
 
-extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
-extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
-    cred_t *cr);
-extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
-extern int secpolicy_zfs(const cred_t *cr);
-
 #define	DDI_SLEEP	KM_SLEEP
 #define	ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 	sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)

lib/libzpool/kernel.c

@@ -482,34 +482,6 @@ kernel_fini(void)
 	libspl_fini();
 }
 
-int
-zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
-{
-	(void) name, (void) cr;
-	return (0);
-}
-
-int
-zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
-{
-	(void) from, (void) to, (void) cr;
-	return (0);
-}
-
-int
-zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
-{
-	(void) name, (void) cr;
-	return (0);
-}
-
-int
-secpolicy_zfs(const cred_t *cr)
-{
-	(void) cr;
-	return (0);
-}
-
 zfs_file_t *
 zfs_onexit_fd_hold(int fd, minor_t *minorp)
 {