Remove service-compiler related code.

tools/servicec/lib/src/resources/java/dartino/MessageReader.java

-// Copyright (c) 2015, the Dartino 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.md file.
-
-package dartino;
-
-class MessageReader {
-  public MessageReader(byte[][] rawSegments) {
-    int length = rawSegments.length;
-    segments = new Segment[length];
-    for (int i = 0; i < length; i++) {
-      segments[i] = new Segment(this, rawSegments[i]);
-    }
-  }
-
-  public int segmentCount() { return segments.length; }
-  public Segment getSegment(int id) { return segments[id]; }
-
-  private Segment[] segments;
-}