Revert "Module-builtin assertions, disabling assertions and submodule assertions"

nixos/modules/misc/assertions.nix

@@ -1,4 +1,4 @@
-{ lib, config, ... }:
+{ lib, ... }:
 
 with lib;
 
@@ -30,18 +30,5 @@ with lib;
     };
 
   };
-
-  config._module.checks = lib.listToAttrs (lib.imap1 (n: value:
-    let
-      name = "_${toString n}";
-      isWarning = lib.isString value;
-      result = {
-        check = if isWarning then false else value.assertion;
-        type = if isWarning then "warning" else "error";
-        message = if isWarning then value else value.message;
-      };
-    in nameValuePair name result
-  ) (config.assertions ++ config.warnings));
-
   # impl of assertions is in <nixpkgs/nixos/modules/system/activation/top-level.nix>
 }