Remove workaround for missing setter function returns (dartbug.com/15914).

pkg/analyzer/lib/src/services/formatter_impl.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.
 
 library formatter_impl;
 
 import 'dart:math';
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/src/generated/java_core.dart' show CharSequence;
@@ skipping 813 matching lines @@
     if (node.body is! EmptyStatement) {
       space();
     }
     visit(node.body);
   }
 
   visitFunctionDeclaration(FunctionDeclaration node) {
     preserveLeadingNewlines();
     visitNodes(node.metadata, followedBy: newlines);
     modifier(node.externalKeyword);
-    //TODO(pquitslund): remove this workaround once setter functions
-    //have their return types properly set (dartbug.com/15914)
-    if (node.returnType == null && node.propertyKeyword != null) {
-      var previous = node.propertyKeyword.previous;
-      if (previous is KeywordToken && previous.keyword == Keyword.VOID) {
-        modifier(previous);
-      }
-    } else {
-      visitNode(node.returnType, followedBy: space);
-    }
+    visitNode(node.returnType, followedBy: space);
     modifier(node.propertyKeyword);
     visit(node.name);
     visit(node.functionExpression);
   }
 
   visitFunctionDeclarationStatement(FunctionDeclarationStatement node) {
     visit(node.functionDeclaration);
   }
 
   visitFunctionExpression(FunctionExpression node) {
@@ skipping 837 matching lines @@
     var lastLine =
         lineInfo.getLocation(lastOffset).lineNumber;
     var currentLine =
         lineInfo.getLocation(currentOffset).lineNumber;
     return currentLine - lastLine;
   }
 
   String toString() => writer.toString();
 
 }