tunables: remove FreeBSD compat macros for Linux module params

Nothing in any FreeBSD code uses them.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Alexander Motin <[email protected]>
Reviewed-by: Pavel Snajdr <[email protected]>
Signed-off-by: Rob Norris <[email protected]>
Closes openzfs#17377

Author: robn

include/os/freebsd/spl/sys/ccompile.h

@@ -43,10 +43,7 @@ extern "C" {
 #endif
 
 #define	EXPORT_SYMBOL(x)
-#define	module_param(a, b, c)
-#define	module_param_call(a, b, c, d, e)
-#define	module_param_named(a, b, c, d)
-#define	MODULE_PARM_DESC(a, b)
+
 #define	asm __asm
 #ifdef ZFS_DEBUG
 #undef NDEBUG

module/os/freebsd/zfs/zio_crypt.c

@@ -1822,9 +1822,3 @@ zio_do_crypt_abd(boolean_t encrypt, zio_crypt_key_t *key, dmu_object_type_t ot,
 
 	return (SET_ERROR(ret));
 }
-
-#if defined(_KERNEL) && defined(HAVE_SPL)
-module_param(zfs_key_max_salt_uses, ulong, 0644);
-MODULE_PARM_DESC(zfs_key_max_salt_uses, "Max number of times a salt value "
-	"can be used for generating encryption keys before it is rotated");
-#endif