SQOOP-2795: Clean up useless code in class TestSqoopJsonUtil

(Ze Jin via Jarek Jarcec Cecho)
diff --git a/src/java/org/apache/sqoop/util/SqoopJsonUtil.java b/src/java/org/apache/sqoop/util/SqoopJsonUtil.java
index c1b40cd..6e9ed00 100644
--- a/src/java/org/apache/sqoop/util/SqoopJsonUtil.java
+++ b/src/java/org/apache/sqoop/util/SqoopJsonUtil.java
@@ -35,6 +35,9 @@
   public static final Log LOG = LogFactory
     .getLog(SqoopJsonUtil.class.getName());
 
+  private SqoopJsonUtil() {
+  }
+
   public static String getJsonStringforMap(Map<String, String> map) {
     JSONObject pathPartMap = new JSONObject(map);
     return pathPartMap.toString();
diff --git a/src/test/org/apache/sqoop/util/TestSqoopJsonUtil.java b/src/test/org/apache/sqoop/util/TestSqoopJsonUtil.java
index 859e97d..ce5f4a4 100644
--- a/src/test/org/apache/sqoop/util/TestSqoopJsonUtil.java
+++ b/src/test/org/apache/sqoop/util/TestSqoopJsonUtil.java
@@ -4,13 +4,11 @@
 
 import java.util.HashMap;
 import java.util.Map;
-import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
 public class TestSqoopJsonUtil {
 
-  private SqoopJsonUtil jsonUtil;
   private static Map<String, String> paramMap;
   private static String jsonStr;