drop applied systemd patch

nix/pkgs/systemd.nix

@@ -10,10 +10,5 @@ systemd.overrideAttrs (old: {
         url = "https://github.com/Mic92/systemd/commit/93a2921a81cab3be9b7eacab6b0095c96a0ae9e2.patch";
         sha256 = "sha256-7WlhMLE7sfD3Cxn6n6R1sUNzUOvas7XMyabi3bsq7jM=";
       })
-      # included in next release: https://github.com/systemd/systemd/pull/25721
-      (fetchpatch {
-        url = "https://github.com/systemd/systemd/commit/39ed2f02d0a00505fce34ce4281cc6e4f016ec6b.patch";
-        sha256 = "sha256-RD8GhOxzNNgC0KKThRaeF2uP8Y+Tt7kVSDtf1ukUwcI=";
-      })
     ];
 })