home-assistant: Stop exposing component & package files

These were only ever used in a test, but for an upcoming change in
dependency handling, they mean we need to rebuild home-assistant for
each change in used components for no good reason.

This would mean building two additional home-assistant derivations for
the NixOS test alone.

pkgs/servers/home-assistant/default.nix

@@ -265,10 +265,6 @@ let
   # Ensure that we are using a consistent package set
   extraBuildInputs = extraPackages python.pkgs;
 
-  # Create info about included packages and components
-  extraComponentsFile = writeText "home-assistant-components" (lib.concatStringsSep "\n" extraComponents);
-  extraPackagesFile = writeText "home-assistant-packages" (lib.concatMapStringsSep "\n" (pkg: pkg.pname) extraBuildInputs);
-
   # Don't forget to run parse-requirements.py after updating
   hassVersion = "2023.2.5";
 
@@ -428,11 +424,6 @@ in python.pkgs.buildPythonApplication rec {
     export PATH=${inetutils}/bin:$PATH
   '';
 
-  postInstall = ''
-    cp -v ${extraComponentsFile} $out/extra_components
-    cp -v ${extraPackagesFile} $out/extra_packages
-  '';
-
   passthru = {
     inherit
       availableComponents