svn merge -c 1399866 from trunk for HDFS-4074. Remove the unused default constructor from INode.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1399869 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -68,6 +68,9 @@ Release 2.0.3-alpha - Unreleased
 
     HDFS-4073. Two minor improvements to FSDirectory.  (Jing Zhao via szetszwo)
 
+    HDFS-4074. Remove the unused default constructor from INode.  (Brandon Li
+    via szetszwo)
+
   OPTIMIZATIONS
 
   BUG FIXES 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INode.java

@@ -96,13 +96,6 @@ abstract class INode implements Comparable<byte[]> {
     }
   }
 
-  protected INode() {
-    name = null;
-    parent = null;
-    modificationTime = 0;
-    accessTime = 0;
-  }
-
   INode(PermissionStatus permissions, long mTime, long atime) {
     this.name = null;
     this.parent = null;