afs: remove variable nr_servers

jira LE-1907
Rebuild_History Non-Buildable kernel-rt-5.14.0-284.30.1.rt14.315.el9_2
commit-author Colin Ian King <colin.i.king@gmail.com>
commit 318b83b

Variable nr_servers is no longer being used, the last reference
to it was removed in commit 45df846 ("afs: Fix server list handling")
so clean up the code by removing it.

	Signed-off-by: Colin Ian King <colin.i.king@gmail.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/20221020173923.21342-1-colin.i.king@gmail.com/
(cherry picked from commit 318b83b)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

fs/afs/volume.c

@@ -70,11 +70,7 @@ static struct afs_volume *afs_alloc_volume(struct afs_fs_context *params,
 {
 	struct afs_server_list *slist;
 	struct afs_volume *volume;
-	int ret = -ENOMEM, nr_servers = 0, i;
-
-	for (i = 0; i < vldb->nr_servers; i++)
-		if (vldb->fs_mask[i] & type_mask)
-			nr_servers++;
+	int ret = -ENOMEM;
 
 	volume = kzalloc(sizeof(struct afs_volume), GFP_KERNEL);
 	if (!volume)