bcache: Remove an unused variable

BugLink: https://bugs.launchpad.net/bugs/1784665Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
(cherry picked from commit f0d38140)
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

drivers/md/bcache/extents.c

@@ -533,7 +533,6 @@ static bool bch_extent_bad_expensive(struct btree *b, const struct bkey *k,
 static bool bch_extent_bad(struct btree_keys *bk, const struct bkey *k)
 {
 	struct btree *b = container_of(bk, struct btree, keys);
-	struct bucket *g;
 	unsigned i, stale;
 
 	if (!KEY_PTRS(k) ||
@@ -548,7 +547,6 @@ static bool bch_extent_bad(struct btree_keys *bk, const struct bkey *k)
 		return false;
 
 	for (i = 0; i < KEY_PTRS(k); i++) {
-		g = PTR_BUCKET(b->c, k, i);
 		stale = ptr_stale(b->c, k, i);
 
 		btree_bug_on(stale > 96, b,