Source Box Content missing?

Hello, after the new update my TTT server now has all of the CS maps and DM maps. I went to go delete the maps and I noticed there was no directories for the other Source games. How do I delete these maps now? Sorry for the stupid question!

165 changed everything about how content is mounted to Garry’s Mod. Now games no longer use .GCF files and must instead use the new SteamPipe format. The thread here goes over all of the new ways server owners must use SteamCMD to add/remove mounted content.