Revert "lib/modules: disallow setting config, options in specialArgs of evalModules" (#391017)

lib/modules.nix

@@ -5,7 +5,6 @@ let
     addErrorContext
     all
     any
-    assertMsg
     attrByPath
     attrNames
     catAttrs
@@ -102,8 +101,6 @@ let
                 , # This would be remove in the future, Prefer _module.check option instead.
                   check ? true
                 }:
-    assert assertMsg (!specialArgs?config) "Do not set config in the specialArgs argument to evalModules.";
-    assert assertMsg (!specialArgs?options) "Do not set options in the specialArgs argument to evalModules.";
     let
       withWarnings = x:
         warnIf (evalModulesArgs?args) "The args argument to evalModules is deprecated. Please set config._module.args instead."

lib/tests/modules.sh

@@ -137,9 +137,6 @@ checkConfigOutput '^true$' config.result ./module-argument-default.nix
 # gvariant
 checkConfigOutput '^true$' config.assertion ./gvariant.nix
 
-# specialArgs checks for evalModules
-checkConfigError 'Do not set config in the specialArgs argument to evalModules\.' config.fail.config ./specialArgs-config.nix
-checkConfigError 'Do not set options in the specialArgs argument to evalModules\.' config.fail.config ./specialArgs-options.nix
 checkConfigOutput '"ok"' config.result ./specialArgs-lib.nix
 
 # https://github.com/NixOS/nixpkgs/pull/131205

lib/tests/modules/specialArgs-config.nix

@@ -1,18 +0,0 @@
-{ lib, ... }:
-{
-  config = {
-    _module.freeformType = lib.types.anything;
-
-    fail = lib.evalModules {
-      specialArgs = {
-        config = { };
-      };
-      modules = [
-        {
-          options.a = lib.mkEnableOption "a";
-          config.a = true;
-        }
-      ];
-    };
-  };
-}

lib/tests/modules/specialArgs-options.nix

@@ -1,18 +0,0 @@
-{ lib, ... }:
-{
-  config = {
-    _module.freeformType = lib.types.anything;
-
-    fail = lib.evalModules {
-      specialArgs = {
-        options = { };
-      };
-      modules = [
-        {
-          options.a = lib.mkEnableOption "a";
-          config.a = true;
-        }
-      ];
-    };
-  };
-}