Remove unused code.

pkg/analysis_server/lib/src/computer/error.dart

Index: pkg/analysis_server/lib/src/computer/error.dart
diff --git a/pkg/analysis_server/lib/src/computer/error.dart b/pkg/analysis_server/lib/src/computer/error.dart
deleted file mode 100644
index 11f6d68e16d79819491efbd3fc32c247eda21c01..0000000000000000000000000000000000000000
--- a/pkg/analysis_server/lib/src/computer/error.dart
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright (c) 2014, 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 computer.error;
-
-import 'package:analysis_server/src/protocol.dart';
-import 'package:analyzer/src/generated/engine.dart' as engine;
-import 'package:analyzer/src/generated/error.dart' as engine;
-import 'package:analyzer/src/generated/source.dart' as engine;
-
-
-/**
- * Returns a JSON correponding to the given list of Engine errors.
- */
-List<Map<String, Object>> engineErrorsToJson(engine.LineInfo lineInfo,
-    List<engine.AnalysisError> errors) {
-  return errors.map((engine.AnalysisError error) {
-    return new AnalysisError.fromEngine(lineInfo, error).toJson();
-  }).toList();
-}