flake.nix: remove alioth from prebuilt for now

breaks prebuilt-23.11

Author: astro

flake.nix

@@ -111,7 +111,7 @@
                 crosvm-example
                 kvmtool-example
                 stratovirt-example
-                alioth-example
+                # alioth-example
                 virtiofsd
               ];
               pathsToLink = [ "/" ];