keys: Remove unused extern declarations

Since commit b2a4df2 ("KEYS: Expand the capacity of a keyring")
iterate_over_keyring() is never used, so can be removed.

And commit b5f545c ("[PATCH] keys: Permit running process to instantiate keys")
left behind keyring_search_instkey().

Fixes: b2a4df2 ("KEYS: Expand the capacity of a keyring")
Fixes: b5f545c ("[PATCH] keys: Permit running process to instantiate keys")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>

Author: YueHaibing

security/keys/internal.h

@@ -109,13 +109,6 @@ extern void __key_link_end(struct key *keyring,
 extern key_ref_t find_key_to_update(key_ref_t keyring_ref,
 				    const struct keyring_index_key *index_key);
 
-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;