Revert "MAPREDUCE-7103. Fix TestHistoryViewerPrinter on windows due to a mismatch line separator. Contributed by Giovanni Matteo Fumarola."

This reverts commit cd34c229a7c31f656638dda2c5f8edbcca197c0c.

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/jobhistory/TestHistoryViewerPrinter.java

@@ -43,8 +43,6 @@ public class TestHistoryViewerPrinter {
 
   private final String LINE_SEPARATOR = System.lineSeparator();
 
-  private final String LINE_SEPARATOR = System.lineSeparator();
-
   @Test
   public void testHumanPrinter() throws Exception {
     JobHistoryParser.JobInfo job = createJobInfo();