Select the objects and then press Backspace (Windows) or Delete.
Select the objects and then choose Edit > Clear or Edit > Cut.
Select the items you want to delete in the Layers
panel, and then click the Delete icon . Alternatively,
drag the item name in the Layers panel to the Delete icon in the
panel, or choose Delete “Layer name” from the Layers
panel menu.
Deleting a layer also deletes all artwork that is in the layer. For example, if you delete a layer that contains sublayers, groups, paths, and clipping sets, all those elements will be deleted along with the layer.