Garry's Mod map refuses to be deleted

I recently made my first map in Hammer Editor via Source SDK. The map was just for testing, so later on that day I decided I wanted to delete the map. So I went in the Garry’s Mod directory, into the maps folder and I deleted all the files of the map, yet when I run Garry’s Mod I still find the map in the maplist. Is there any way to completely get rid of the map so that it does not appear in the maplist?

Thanks in advance!