pstore/zone: Don't clear memory twice

There is no need to call memset(..., 0, ...) on memory allocated by
kcalloc(). It is already zeroed.

Remove the redundant call.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/fa2597400051c18c6ca11187b0e4b906729991b2.1709972649.git.christophe.jaillet@wanadoo.frSigned-off-by: Kees Cook <keescook@chromium.org>

fs/pstore/zone.c

@@ -1217,7 +1217,6 @@ static struct pstore_zone **psz_init_zones(enum pstore_type_id type,
 		pr_err("allocate for zones %s failed\n", name);
 		return ERR_PTR(-ENOMEM);
 	}
-	memset(zones, 0, c * sizeof(*zones));
 
 	for (i = 0; i < c; i++) {
 		zone = psz_init_zone(type, off, record_size);