[ROLES] Clean up a bit.

systems/goliath.nix

@@ -12,10 +12,8 @@ _: let
         sound
       ]
       ++ (with tree.nixos.roles; [
-        graphical
-        gaming
         gnome
-        bootable
+        gaming
       ])
       ++ (with tree.kat; [
         gui

systems/koishi.nix

@@ -10,10 +10,8 @@ _: let
         common-pc-laptop-ssd
       ]
       ++ (with tree.nixos.roles; [
-        graphical
         sway
         laptop
-        bootable
       ])
       ++ (with tree; [
         kat.gui

systems/renko.nix

@@ -6,9 +6,9 @@ _: let
   }: let
     inherit (lib.modules) mkDefault;
   in {
-    imports = with tree; [
-      nixos.rosetta
-      nixos.roles.bootable
+    imports = with tree.nixos.roles; [
+      rosetta
+      bootable
     ];
 
     boot = {