Remove AstFactory.field()

pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart

 // Copyright (c) 2017, 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.
 
 import 'package:front_end/src/fasta/kernel/utils.dart';
 import 'package:front_end/src/fasta/scanner/token.dart' show Token;
 import 'package:front_end/src/fasta/type_inference/type_promotion.dart';
 import 'package:kernel/ast.dart';
 
 import '../builder/ast_factory.dart';
 import 'kernel_shadow_ast.dart';
 
 /// Concrete implementation of [builder.AstFactory] for building a kernel AST.
 class KernelAstFactory implements AstFactory<VariableDeclaration> {
   @override
   KernelBlock block(List<Statement> statements, Token beginToken) {
     return new KernelBlock(statements)..fileOffset = offsetForToken(beginToken);
   }
 
   @override
   ExpressionStatement expressionStatement(Expression expression) {
     return new KernelExpressionStatement(expression);
   }
 
   @override
-  Field field(Name name, int charOffset, {String fileUri}) {
-    return new KernelField(name, fileUri: fileUri)..fileOffset = charOffset;
-  }
-
-  @override
   FunctionExpression functionExpression(FunctionNode function, Token token) {
     return new KernelFunctionExpression(function)
       ..fileOffset = offsetForToken(token);
   }
 
   @override
   Statement ifStatement(
       Expression condition, Statement thenPart, Statement elsePart) {
     return new KernelIfStatement(condition, thenPart, elsePart);
   }
@@ skipping 58 matching lines @@
   @override
   VariableGet variableGet(
       VariableDeclaration variable,
       TypePromotionFact<VariableDeclaration> fact,
       TypePromotionScope scope,
       Token token) {
     return new KernelVariableGet(variable, fact, scope)
       ..fileOffset = offsetForToken(token);
   }
 }