[PATCH -next] keys: Remove unused extern declaration iterate_over_keyring()

[YueHaibing]

Since commit b2a4df200d57 ("KEYS: Expand the capacity of a keyring")
this is never used, so can be removed.

Signed-off-by: YueHaibing <yuehaibing at huawei.com>
---
 security/keys/internal.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/security/keys/internal.h b/security/keys/internal.h
index 3c1e7122076b..95a82eec1816 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -112,10 +112,6 @@ extern key_ref_t find_key_to_update(key_ref_t keyring_ref,
 extern struct key *keyring_search_instkey(struct key *keyring,
 					  key_serial_t target_id);
 
-extern int iterate_over_keyring(const struct key *keyring,
-				int (*func)(const struct key *key, void *data),
-				void *data);
-
 struct keyring_search_context {
 	struct keyring_index_key index_key;
 	const struct cred	*cred;
-- 
2.34.1