castxml: remove inherit (.*) reference on all-packages.nix

According to the issue linked at the end, filling arguments for `callPackage` in
all-packages.nix breaks splicing and makes the expressions incompatible with
cross-compilation.

This issue is more pronounced in the many `inherit (darwin)` calls. However, it
is present in similar contexts too.

The idea here is not the smartest: it just hides those inheritances from
`all-packages.nix` and sends them to the `default.nix` expressions.

Issue: https://github.com/NixOS/nixpkgs/issues/204303

pkgs/development/tools/castxml/default.nix

@@ -1,17 +1,20 @@
-{ lib
+{ lib,
-, stdenv
+  stdenv,
-, fetchFromGitHub
+  fetchFromGitHub,
-, cmake
+  cmake,
-, libclang
+  libffi,
-, libffi
+  libxml2,
-, libxml2
+  zlib,
-, llvm
+  withManual ? true,
-, sphinx
+  withHTML ? true,
-, zlib
+  llvmPackages,
-, withManual ? true
+  python3,
-, withHTML ? true
 }:
 
+let
+  inherit (llvmPackages) libclang llvm;
+  inherit (python3.pkgs) sphinx;
+in
 stdenv.mkDerivation (finalAttrs: {
   pname = "castxml";
   version = "0.5.1";

pkgs/top-level/all-packages.nix

@@ -357,10 +357,7 @@ with pkgs;
 
   castget = callPackage ../applications/networking/feedreaders/castget { };
 
-  castxml = callPackage ../development/tools/castxml {
+  castxml = callPackage ../development/tools/castxml { };
-    inherit (llvmPackages) libclang llvm;
-    inherit (python3.pkgs) sphinx;
-  };
 
   catatonit = callPackage ../applications/virtualization/catatonit { };