Fix some warnings in Eclipse

javatests/org/chromium/distiller/PageParameterDetectorTest.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.distiller;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
 public class PageParameterDetectorTest extends DomDistillerJsTestCase {
 
     public void testDynamicPara() {
         final String testUrl = "http://bbs.globalimporter.net/bbslist-N11101107-33-0.htm";
         final PageParamContentInfo[] allContentInfo = {
             NumericOutlink("http://bbs.globalimporter.net/bbslist-N11101107-32-0.htm", 32),
             NumberInPlainText(33),
             NumericOutlink("http://bbs.globalimporter.net/bbslist-N11101107-34-0.htm", 34),
             NumericOutlink("http://bbs.globalimporter.net/bbslist-N11101107-35-0.htm", 35),
         };
@@ skipping 872 matching lines @@
     }
 
     static void expectEmptyPageParamInfo(PageParamInfo info) {
         assertEquals(PageParamInfo.Type.UNSET, info.mType);
         assertEquals(0, info.mAllPageInfo.size());
         assertTrue(info.mFormula == null);
         assertTrue(info.mNextPagingUrl.isEmpty());
     }
 
 }