Get rid of a lot of () for getters.

tests/language/bad_override_test.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.
 
 class Fisk {
-  get fisk() => null;
+  get fisk => null;
   static /// 01: compile-time error
   set fisk(x) {}
   static /// 02: compile-time error
-  get hest() => null;
+  get hest => null;
   set hest(x) {}
   foo() {}
   var field;
   method() {}
   nullary() {}
 }
 
 class Hest extends Fisk {
   static foo() {} /// 03: compile-time error
   field() {} /// 04: compile-time error
   var method; /// 05: compile-time error
   nullary(x) {} /// 06: compile-time error
 }
 
 main() {
   new Fisk();
   new Hest();
 }