diff --git a/core/src/main/scala/kafka/server/KafkaConfig.scala b/core/src/main/scala/kafka/server/KafkaConfig.scala
index b324344..8f9db10 100644
--- a/core/src/main/scala/kafka/server/KafkaConfig.scala
+++ b/core/src/main/scala/kafka/server/KafkaConfig.scala
@@ -104,27 +104,15 @@ class KafkaConfig private (val props: VerifiableProperties) extends ZKConfig(pro
   /* the maximum size of a single log file */
   val logSegmentBytes = props.getIntInRange("log.segment.bytes", 1*1024*1024*1024, (Message.MinHeaderSize, Int.MaxValue))
 
-  /* the maximum size of a single log file for some specific topic */
-  val logSegmentBytesPerTopicMap = props.getMap("log.segment.bytes.per.topic", _.toInt > 0).mapValues(_.toInt)
-
   /* the maximum time before a new log segment is rolled out */
   val logRollHours = props.getIntInRange("log.roll.hours", 24*7, (1, Int.MaxValue))
 
-  /* the number of hours before rolling out a new log segment for some specific topic */
-  val logRollHoursPerTopicMap = props.getMap("log.roll.hours.per.topic", _.toInt > 0).mapValues(_.toInt)
-
   /* the number of hours to keep a log file before deleting it */
   val logRetentionTimeMillis = getLogRetentionTimeMillis
 
-  /* the number of hours to keep a log file before deleting it for some specific topic*/
-  val logRetentionHoursPerTopicMap = props.getMap("log.retention.hours.per.topic", _.toInt > 0).mapValues(_.toInt)
-
   /* the maximum size of the log before deleting it */
   val logRetentionBytes = props.getLong("log.retention.bytes", -1)
 
-  /* the maximum size of the log for some specific topic before deleting it */
-  val logRetentionBytesPerTopicMap = props.getMap("log.retention.bytes.per.topic", _.toLong > 0).mapValues(_.toLong)
-  
   /* the frequency in minutes that the log cleaner checks whether any log is eligible for deletion */
   val logCleanupIntervalMs = props.getLongInRange("log.retention.check.interval.ms", 5*60*1000, (1, Long.MaxValue))