Inventory Junk Remover

It would be an item that you keep in your offhand. The idea behind this is that you can choose a block or item that you dont want in your inventory and it will constantly keep the item or block out. Personally I think that it should keep up to 3 items out of your inventory but that's for you to decide, if it is a high number maybe it could have durability and need to be repaired every once in a while. This would work well for mob farms, mining, and exploration. For example you could be mining for ancient debris in the nether and set this item to keep netherrack out. I think it would be a lifesaver for the people who constantly have a full inventory.