Remove support for getters with parameters.

tests/compiler/dart2js/simple_inferrer_postfix_prefix_test.dart

 // Copyright (c) 2013, 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:expect/expect.dart';
 import 'compiler_helper.dart';
 import 'parser_helper.dart';
 
 const String TEST = """
 
@@ skipping 10 matching lines @@
   returnDynamic2() => this[index]--;
   returnNum3() => --this[index];
   returnNum4() => this[index] -= 42;
 
   returnDynamic3() => this.bar--;
   returnNum5() => --this.bar;
   returnNum6() => this.bar -= 42;
 }
 
 class B extends A {
-  get foo() => 42;
+  get foo => 42;
   operator[](index) => 42;
 
   returnString1() => super.foo--;
   returnDynamic1() => --super.foo;
   returnDynamic2() => super.foo -= 42;
 
   returnString2() => super[index]--;
   returnDynamic3() => --super[index];
   returnDynamic4() => super[index] -= 42;
 }
@@ skipping 45 matching lines @@
   checkReturnInClass('A', 'returnDynamic2', subclassOfInterceptor);
   checkReturnInClass('A', 'returnDynamic3', typesTask.dynamicType);
 
   checkReturnInClass('B', 'returnString1', typesTask.stringType);
   checkReturnInClass('B', 'returnString2', typesTask.stringType);
   checkReturnInClass('B', 'returnDynamic1', typesTask.dynamicType);
   checkReturnInClass('B', 'returnDynamic2', typesTask.dynamicType);
   checkReturnInClass('B', 'returnDynamic3', typesTask.dynamicType);
   checkReturnInClass('B', 'returnDynamic4', typesTask.dynamicType);
 }