HOTFIX: Remove duplicate entry from ApiVersion

Author: Ismael Juma <ismael@juma.me.uk>

Reviewers: Jun Rao <junrao@gmail.com>

Closes #2818 from ijuma/fix-api-version

clients/src/main/java/org/apache/kafka/common/requests/OffsetsForLeaderEpochRequest.java

@@ -145,9 +145,9 @@ public class OffsetsForLeaderEpochRequest extends AbstractRequest {
         return new OffsetsForLeaderEpochResponse(errorResponse);
     }
 
-    private class PartitionLeaderEpoch {
-        int partitionId;
-        int epoch;
+    private static class PartitionLeaderEpoch {
+        final int partitionId;
+        final int epoch;
 
         public PartitionLeaderEpoch(int partitionId, int epoch) {
             this.partitionId = partitionId;

core/src/main/scala/kafka/api/ApiVersion.scala

@@ -67,8 +67,7 @@ object ApiVersion {
     "0.11.0-IV0" -> KAFKA_0_11_0_IV0,
     // introduced DeleteRecordsRequest v0 and FetchRequest v4 in KIP-107
     "0.11.0-IV1" -> KAFKA_0_11_0_IV1,
-    "0.11.0" -> KAFKA_0_11_0_IV1,
-    // Introduce leader epoch fetches to the replica fetcher via KIP-101
+    // Introduced leader epoch fetches to the replica fetcher via KIP-101
     "0.11.0-IV2" -> KAFKA_0_11_0_IV2,
     "0.11.0" -> KAFKA_0_11_0_IV2
   )