Get rid of a lot of () for getters.

tests/language/field2_negative_test.dart

 // Copyright (c) 2011, 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.
 // Dart test to catch error reporting bugs in class fields declarations.
 // Should be an error because we have setter/getter functions and fields
 // in the class.
 
 class C {
-  get a() {
+  get a {
     return 1;
   }
   set a(int val) {
     var x = val;
   }
 
-  get b() {
+  get b {
     return 2;
   }
   set b(int val) {
     var x = val;
   }
 
   var a;
 }
 
 
 class Field2NegativeTest {
   static testMain() {
   }
 }
 
 main() {
   Field2NegativeTest.testMain();
 }