Revert HADOOP-9241 properly this time. Left the core-default.xml in previous commit.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1439750 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/src/main/resources/core-default.xml

@@ -439,18 +439,6 @@
   <description>Disk usage statistics refresh interval in msec.</description>
 </property>
 
-<property>
-  <name>fs.du.interval</name>
-  <value>60000</value>
-  <description>File space usage statistics refresh interval in msec.</description>
-</property>
-
-<property>
-  <name>fs.du.interval</name>
-  <value>60000</value>
-  <description>File space usage statistics refresh interval in msec.</description>
-</property>
-
 <property>
   <name>fs.s3.block.size</name>
   <value>67108864</value>