KEYS: Remove unused declarations

These declarations are never implemented, remove it.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>

include/keys/dns_resolver-type.h

@@ -12,8 +12,4 @@
 
 extern struct key_type key_type_dns_resolver;
 
-extern int request_dns_resolver_key(const char *description,
-				    const char *callout_info,
-				    char **data);
-
 #endif /* _KEYS_DNS_RESOLVER_TYPE_H */

include/linux/key.h

@@ -436,9 +436,6 @@ extern key_ref_t keyring_search(key_ref_t keyring,
 				const char *description,
 				bool recurse);
 
-extern int keyring_add_key(struct key *keyring,
-			   struct key *key);
-
 extern int keyring_restrict(key_ref_t keyring, const char *type,
 			    const char *restriction);