RDMA/rxe: Save a few bytes from struct rxe_pool

'table_size' is never read, it can be removed.

In fact, the only place that uses something that could be 'table_size' is
'alloc_index()'. In this function, it is re-computed from 'min_index' and
'max_index'.

Link: https://lore.kernel.org/r/2c42065049bb2b99bededdc423a9babf4a98adee.1635093628.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/sw/rxe/rxe_pool.c

@@ -114,7 +114,6 @@ static int rxe_pool_init_index(struct rxe_pool *pool, u32 max, u32 min)
 		goto out;
 	}
 
-	pool->index.table_size = size;
 	bitmap_zero(pool->index.table, max - min + 1);
 
 out:

drivers/infiniband/sw/rxe/rxe_pool.h

@@ -74,7 +74,6 @@ struct rxe_pool {
 	struct {
 		struct rb_root		tree;
 		unsigned long		*table;
-		size_t			table_size;
 		u32			last;
 		u32			max_index;
 		u32			min_index;