Revert "fwupd: Move D-Bus conf file to share/dbus-1/system.d"

This reverts commit ad6aada7e2.

The patch does not apply to our version.
This commit was part of https://github.com/NixOS/nixpkgs/pull/68875

cc @worldofpeace

pkgs/os-specific/linux/firmware/fwupd/default.nix

@@ -2,7 +2,6 @@
 
 { stdenv
 , fetchurl
-, fetchpatch
 , substituteAll
 , gtk-doc
 , pkgconfig
@@ -154,11 +153,6 @@ stdenv.mkDerivation rec {
       # needs a different set of modules than po/make-images
       inherit installedTestsPython;
     })
-    # Don't use etc/dbus-1/system.d
-    (fetchpatch {
-      url = "https://github.com/fwupd/fwupd/commit/41a25be6f4b371c367904284e9251cd461ad5cfe.patch";
-      sha256 = "0vv3x2pq5bpmg9c8ax5dsqcblw45n7jmzgw6p8h4asyjy57mzhaq";
-    })
   ];
 
   postPatch = ''