Update the tests testing the use of built in identifiers

tests/language/pseudo_kw_illegal_test.dart

Index: tests/language/pseudo_kw_illegal_test.dart
diff --git a/tests/language/pseudo_kw_illegal_test.dart b/tests/language/pseudo_kw_illegal_test.dart
deleted file mode 100644
index 32d80413563ad8647a525393cd55ea6b4a40a72a..0000000000000000000000000000000000000000
--- a/tests/language/pseudo_kw_illegal_test.dart
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-// Check that we cannot use a pseudo keyword at the class level code.
-
-// Pseudo keywords are not allowed to be used as class names.
-class abstract { }    /// 01: compile-time error
-class assert { }      /// 02: compile-time error
-class dynamic { }     /// 04: compile-time error
-class export { }      /// 17: compile-time error
-class factory { }     /// 05: compile-time error
-class get { }         /// 06: compile-time error
-class implements { }  /// 07: compile-time error
-class import { }      /// 08: compile-time error
-class library { }     /// 10: compile-time error
-class operator { }    /// 12: compile-time error
-class part { }        /// 18: compile-time error
-class set { }         /// 13: compile-time error
-class static { }      /// 15: compile-time error
-class typedef { }     /// 16: compile-time error
-
-main() { }