nfsd: Drop LIST_HEAD where the variable it declares is never used.

The declarations were introduced with the file, but the declared
variables were not used.

Fixes: 65294c1f ("nfsd: add a new struct file caching facility to nfsd")
Signed-off-by: Mao Wenan <maowenan@huawei.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/filecache.c

@@ -685,8 +685,6 @@ nfsd_file_cache_purge(struct net *net)
 void
 nfsd_file_cache_shutdown(void)
 {
-	LIST_HEAD(dispose);
-
 	set_bit(NFSD_FILE_SHUTDOWN, &nfsd_file_lru_flags);
 
 	lease_unregister_notifier(&nfsd_file_lease_notifier);