Remove AstFactory.field()

pkg/front_end/lib/src/fasta/builder/ast_factory.dart

Index: pkg/front_end/lib/src/fasta/builder/ast_factory.dart
diff --git a/pkg/front_end/lib/src/fasta/builder/ast_factory.dart b/pkg/front_end/lib/src/fasta/builder/ast_factory.dart
index 5f138b18869c4de55886e35fcdba7415674858bc..bdf5e5c0b9b05f3260c975b6ffaac54009eff4af 100644
--- a/pkg/front_end/lib/src/fasta/builder/ast_factory.dart
+++ b/pkg/front_end/lib/src/fasta/builder/ast_factory.dart
@@ -41,9 +41,6 @@ abstract class AstFactory<V> {
   /// Creates an expression statement.
   ExpressionStatement expressionStatement(Expression expression);
 
-  /// Creates a field.
-  Field field(Name name, int charOffset, {String fileUri});
-
   /// Creates a function expression.
   FunctionExpression functionExpression(FunctionNode function, Token token);