HADOOP-7308. Remove unused TaskLogAppender configurations from log4j.properties. Contributed by Todd Lipcon and J.Andreina.

(cherry picked from commit 7e58b2478ce10f54b9b9a647f22a69dd528a81e6)

hadoop-common-project/hadoop-common/src/main/conf/log4j.properties

@@ -78,19 +78,7 @@ log4j.appender.console.layout.ConversionPattern=%d{ISO8601} %p %c{2}: %m%n
 #
 # TaskLog Appender
 #
-
-#Default values
-hadoop.tasklog.taskid=null
-hadoop.tasklog.iscleanup=false
-hadoop.tasklog.noKeepSplits=4
-hadoop.tasklog.totalLogFileSize=100
-hadoop.tasklog.purgeLogSplits=true
-hadoop.tasklog.logsRetainHours=12
-
 log4j.appender.TLA=org.apache.hadoop.mapred.TaskLogAppender
-log4j.appender.TLA.taskId=${hadoop.tasklog.taskid}
-log4j.appender.TLA.isCleanup=${hadoop.tasklog.iscleanup}
-log4j.appender.TLA.totalLogFileSize=${hadoop.tasklog.totalLogFileSize}
 
 log4j.appender.TLA.layout=org.apache.log4j.PatternLayout
 log4j.appender.TLA.layout.ConversionPattern=%d{ISO8601} %p %c: %m%n