Revert two Kernel changes that were causing test failures.

tests/language/assertion_initializer_const_error2_test.dart

 // Copyright (c) 201, 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.
 // VMOptions=--assert_initializer
 //
 // Dart test program testing assert statements.
 
 import "package:expect/expect.dart";
 
 class C {
@@ skipping 44 matching lines @@
   const C.cc03(2, 1);  //# cc03: compile-time error
   const C.cc04(2, 1);  //# cc04: compile-time error
   const C.cc05(2, 1);  //# cc05: compile-time error
   const C.cc06(2, 1);  //# cc06: compile-time error
   const C.cc07(2, 1);  //# cc07: compile-time error
   const C.cc08(2, 1);  //# cc08: compile-time error
   const C.cc09(2, 1);  //# cc09: compile-time error
   const C.cc10(2, 1);  //# cc10: compile-time error
   const C.cc11(2, 1);  //# cc11: compile-time error
 }