check style

Author: leolinchen

pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentDispatcherSingleActiveConsumer.java

@@ -21,11 +21,7 @@
 import static com.google.common.base.Preconditions.checkNotNull;
 import static org.apache.pulsar.broker.service.persistent.PersistentTopic.MESSAGE_RATE_BACKOFF_MS;
 import static org.apache.pulsar.common.protocol.Commands.DEFAULT_CONSUMER_EPOCH;
-import com.google.common.collect.Collections2;
-import com.google.common.collect.Lists;
 import io.netty.util.Recycler;
-import java.util.ArrayList;
-import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Optional;
@@ -40,8 +36,6 @@
 import org.apache.bookkeeper.mledger.ManagedLedgerException.ConcurrentWaitCallbackException;
 import org.apache.bookkeeper.mledger.ManagedLedgerException.NoMoreEntriesToReadException;
 import org.apache.bookkeeper.mledger.ManagedLedgerException.TooManyRequestsException;
-import org.apache.bookkeeper.mledger.Position;
-import org.apache.bookkeeper.mledger.impl.EntryImpl;
 import org.apache.bookkeeper.mledger.impl.PositionImpl;
 import org.apache.bookkeeper.mledger.util.SafeRun;
 import org.apache.commons.lang3.tuple.Pair;
@@ -57,7 +51,6 @@
 import org.apache.pulsar.broker.service.persistent.DispatchRateLimiter.Type;
 import org.apache.pulsar.broker.transaction.exception.buffer.TransactionBufferException;
 import org.apache.pulsar.client.impl.Backoff;
-import org.apache.pulsar.common.api.proto.CommandAck;
 import org.apache.pulsar.common.api.proto.CommandSubscribe.SubType;
 import org.apache.pulsar.common.util.Codec;
 import org.slf4j.Logger;

pulsar-broker/src/test/java/org/apache/pulsar/broker/service/BrokerBkEnsemblesTests.java

@@ -38,7 +38,6 @@
 import org.apache.bookkeeper.client.BookKeeper;
 import org.apache.bookkeeper.client.api.LedgerMetadata;
 import org.apache.bookkeeper.mledger.ManagedLedgerConfig;
-import org.apache.bookkeeper.mledger.Position;
 import org.apache.bookkeeper.mledger.impl.ManagedCursorImpl;
 import org.apache.bookkeeper.mledger.impl.ManagedLedgerFactoryImpl;
 import org.apache.bookkeeper.mledger.impl.ManagedLedgerImpl;