imp: move follows responsibility downstream

- also remove unimportant (small) depenencies from follows management
- so that it is less complex as errors occur, since:
- it seems there are still follows issues present upstream

shell/devos.nix

@@ -1,4 +1,4 @@
-{ pkgs, extraModulesPath, ... }:
+{ pkgs, extraModulesPath, inputs, ... }:
 let
 
   hooks = import ./hooks;
@@ -43,12 +43,9 @@ in
     (linter editorconfig-checker)
     # (docs python3Packages.grip) too many deps
     (docs mdbook)
+    (devos inputs.deploy.packages.${pkgs.system}.deploy-rs)
   ]
 
-  ++ lib.optional
-    (pkgs ? deploy-rs)
-    (devos deploy-rs.deploy-rs)
-
   ++ lib.optional
     (system != "i686-linux")
     (devos cachix)