afs: remove afs_cache_netfs and afs_zap_permits() declarations

afs_zap_permits() has been removed since
commit be080a6f ("afs: Overhaul permit caching").

afs_cache_netfs has been removed since
commit 523d27cd ("afs: Convert afs to use the new fscache API").

so remove the declare for them from header file.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/r/20220909070353.1160228-1-cuigaosheng1@huawei.com/

fs/afs/internal.h

@@ -971,13 +971,6 @@ extern int afs_end_cursor(struct afs_addr_cursor *);
 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
 
-/*
- * cache.c
- */
-#ifdef CONFIG_AFS_FSCACHE
-extern struct fscache_netfs afs_cache_netfs;
-#endif
-
 /*
  * callback.c
  */
@@ -1391,7 +1384,6 @@ extern void afs_put_permits(struct afs_permits *);
 extern void afs_clear_permits(struct afs_vnode *);
 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int,
 			     struct afs_status_cb *);
-extern void afs_zap_permits(struct rcu_head *);
 extern struct key *afs_request_key(struct afs_cell *);
 extern struct key *afs_request_key_rcu(struct afs_cell *);
 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);