atf: remove all-packages.nix definition

pkgs/by-name/at/atf/package.nix

@@ -1,6 +1,7 @@
 {
   lib,
   stdenv,
+  darwin,
   fetchFromGitHub,
   fetchpatch,
   autoreconfHook,
@@ -8,7 +9,11 @@
   gitUpdater,
 }:
 
-stdenv.mkDerivation (finalAttrs: {
+let
+  # atf is a dependency of libiconv. Avoid an infinite recursion with `pkgsStatic` by using a bootstrap stdenv.
+  stdenv' = if stdenv.hostPlatform.isDarwin then darwin.bootstrapStdenv else stdenv;
+in
+stdenv'.mkDerivation (finalAttrs: {
   pname = "atf";
   version = "0.23";
 
@@ -26,12 +31,12 @@ stdenv.mkDerivation (finalAttrs: {
         --replace-fail 'atf_test_program{name="srcdir_test"}' ""
     ''
     # These tests fail on Darwin.
-    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.hostPlatform.isDarwin) ''
+    + lib.optionalString (finalAttrs.doInstallCheck && stdenv'.hostPlatform.isDarwin) ''
       substituteInPlace atf-c/detail/process_test.c \
         --replace-fail 'ATF_TP_ADD_TC(tp, status_coredump);' ""
     ''
     # This test fails on Linux.
-    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.hostPlatform.isLinux) ''
+    + lib.optionalString (finalAttrs.doInstallCheck && stdenv'.hostPlatform.isLinux) ''
       substituteInPlace atf-c/detail/fs_test.c \
         --replace-fail 'ATF_TP_ADD_TC(tp, eaccess);' ""
     '';

pkgs/top-level/all-packages.nix

@@ -8539,12 +8539,6 @@ with pkgs;
 
   ### DEVELOPMENT / TESTING TOOLS
 
-  atf = callPackage ../by-name/at/atf/package.nix {
-    stdenv =
-      # atf is a dependency of libiconv. Avoid an infinite recursion with `pkgsStatic` by using a bootstrap stdenv.
-      if stdenv.hostPlatform.isDarwin then darwin.bootstrapStdenv else stdenv;
-  };
-
   ### DEVELOPMENT / LIBRARIES / AGDA
 
   agdaPackages = recurseIntoAttrs (