Deleting a Layer
Select the layer on the [Layer] palette, then select the [Layer] menu > [Delete Layer]. The layer is deleted from the [Layer] palette.
You can also delete a layer by selecting the layer and clicking [Delete Layer] on the [Layer] palette.
If you are using Windows/macOS/Tablet, you can also delete the selected layer by dragging and dropping it to [Delete Layer] on the [Layer] palette.