deprecate commons/hdd module

We havent't had anything meaningful configuration in this module for a while.
So let's deprecate it.

common/pc/hdd/default.nix

@@ -1 +1,9 @@
-{}
+{
+  warnings = [
+    ''
+      DEPRECATED: The <nixos-hardware/common/hdd.nix> module has been deprecated.
+
+      This module has no effect and will be removed in a future release.
+    ''
+  ];
+}

common/pc/laptop/hdd/default.nix

@@ -1,8 +1,6 @@
 { lib, ... }:
 
 {
-  imports = [ ../../hdd ];
-
   # Hard disk protection if the laptop falls:
   services.hdapsd.enable = lib.mkDefault true;
 }

hp/elitebook/2560p/default.nix

@@ -7,7 +7,6 @@ with lib;
     ../../../common/pc
     ../../../common/pc/laptop
     ../../../common/pc/laptop/hdd
-    ../../../common/pc/hdd
 
     ./network.nix
   ];

hp/notebook/14-df0023/default.nix

@@ -7,7 +7,6 @@ with lib;
     ../../../common/pc
     ../../../common/pc/laptop
     ../../../common/pc/laptop/hdd
-    ../../../common/pc/hdd
   ];
 
   config = {