Revert "Towards compiling Hello World!" and "Compile and run Hello World!"

pkg/compiler/lib/src/elements/entities.dart

 // Copyright (c) 2016, 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 entities;
 
 import 'package:front_end/src/fasta/parser/async_modifier.dart'
     show AsyncModifier;
 
 import '../common.dart';
@@ skipping 234 matching lines @@
       this.requiredParameters, this.positionalParameters, this.namedParameters);
 
   const ParameterStructure.getter() : this(0, 0, const <String>[]);
 
   const ParameterStructure.setter() : this(1, 1, const <String>[]);
 
   /// The number of optional parameters (positional or named).
   int get optionalParameters =>
       positionalParameters - requiredParameters + namedParameters.length;
 
-  /// The total number of parameters (required or optional).
-  int get totalParameters => positionalParameters + namedParameters.length;
-
   /// Returns the [CallStructure] corresponding to a call site passing all
   /// parameters both required and optional.
   CallStructure get callStructure {
     return new CallStructure(
         positionalParameters + namedParameters.length, namedParameters);
   }
 }