net/mlx5: Remove unused field in EQ

The size field in EQ is not in use.
Remove it.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Tal Gilboa <talgi@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h

@@ -27,7 +27,6 @@ struct mlx5_eq {
 	__be32 __iomem	        *doorbell;
 	u32                     cons_index;
 	struct mlx5_frag_buf    buf;
-	int                     size;
 	unsigned int            vecidx;
 	unsigned int            irqn;
 	u8                      eqn;