Another Steam Question

[npjnpj]

I bought this awful, awful game (hardcopy from a store) a few days back and now I want it deleted from my steam library completely, so that it doesn't show up in the list any more. I deleted local files etc. but I can't get it to disappear from the list, it just sits there leering at me, marked 'not installed'.
Does anyone know how to get rid of it?

 

[npjnpj]

Ah, I see. That works, thank you very much.

 

[npjnpj]

It's called Naval War: Arctic Circle, a naval strategy game.

I've been a Harpoon fan for years, and I was hoping that this might be something along the same lines.