cannot remove layers, blocks, point styles

[swimwsr]

I have a drawing with a bunch of layers that cannot be deleted since they are nested in block definitions. However, the blocks are not in use and cannot be purged. I think it is because they are referenced for point styles, that are also not in use. Is there a way to delete the point style in order to clear these layers and blocks? Thanks.

[Sinc]

As long as the Point Styles are not being used in your drawing, you can simply right-click on them in Toolspace -> Settings and delete them.  (Note that you cannot do this if they are being used in a Description Key set...  You'll need to delete the Desc Key set, or remove keys that use those Point Styles, before you can delete the Point Style.  If you see a little orange triangle next to the Point Style name, this means something in your drawing - possibly just a Desc Key - is referencing that Point Style.)