Use roles properly

Originally, I was including all role configurations for all hosts, and
controlling which get applied in the role configs with a check in each
file. This is a very repetetive and annoying approach. Instead, now the
role directory is included manually from the hosts config for devices
which meet that role, removing the role options.

options/device/roles.nix

@@ -1,49 +1,11 @@
-{
-  lib,
-  config,
-  ...
-}: let
-  inherit (lib) mkOption types;
-
-  cfg = config.myOptions.device.roles;
+{lib, ...}: let
+  inherit (lib) mkOption;
 in {
   options.myOptions.device.roles = {
-    type = mkOption {
-      type = types.enum ["laptop" "desktop" "server"];
-      default = "";
-      description = ''
-        The type/purpoes of the device that will be used within the rest of the configuration.
-          - laptop: portable devices with battery optimizations
-          - desktop: stationary devices configured for maximum performance
-          - server: server and infrastructure
-      '';
-    };
-
     virtual-machine = mkOption {
       type = lib.types.bool;
       default = false;
       description = "Is this system a virtual machine?";
     };
-
-    isWorkstation = mkOption {
-      type = lib.types.bool;
-      default = builtins.elem cfg.type ["laptop" "desktop"];
-      readOnly = true;
-      description = ''
-        Is this machine a workstation?
-
-        Workstation machines are meant for regular day-to-day use.
-      '';
-    };
-
-    isUniMachine = mkOption {
-      type = lib.types.bool;
-      default = false;
-      description = ''
-        Should University specific configuration be applied?
-
-        (Things like University specific software, etc.)
-      '';
-    };
   };
 }