You can enable removals for unsellable inventory only.
Per-item removal fees apply. For more information, see FBA removal and disposal fees.
When inventory in an Amazon fulfillment center is not in sellable condition, its status changes to Unfulfillable and it is set aside. If you do not create a removal order for your unsellable inventory within 30 days after Amazon notifies you of its required removal, it is likely to be automatically disposed of. See Required removals for more information. You can remove unsellable inventory at any time by submitting a removal order. For more information, see Remove inventory from a fulfillment center.
You can also choose to have unsellable inventory returned to you automatically by enabling the service in your seller account.