Revert "Reland "Merge more Kernel infrastructure from kernel_sdk SDK fork.""

sdk/lib/html/dartium/nativewrappers.dart

 // 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.
 
 library nativewrappers;
 
-class NativeFieldWrapperClass1 {
-  NativeFieldWrapperClass1() {
-    throw new UnsupportedError(
-        "Generative constructors not supported on native types.");
-  }
-}
-
 class NativeFieldWrapperClass2 {
   NativeFieldWrapperClass2() {
     throw new UnsupportedError(
         "Generative constructors not supported on native types.");
   }
 }
-
-class NativeFieldWrapperClass3 {
-  NativeFieldWrapperClass3() {
-    throw new UnsupportedError(
-        "Generative constructors not supported on native types.");
-  }
-}
-
-class NativeFieldWrapperClass4 {
-  NativeFieldWrapperClass4() {
-    throw new UnsupportedError(
-        "Generative constructors not supported on native types.");
-  }
-}
-