Remove unneeded import

Author: rozza

driver-core/src/main/com/mongodb/connection/netty/NettyStream.java

@@ -19,7 +19,6 @@
 import com.mongodb.MongoException;
 import com.mongodb.MongoInternalException;
 import com.mongodb.MongoInterruptedException;
-import com.mongodb.MongoSocketException;
 import com.mongodb.MongoSocketOpenException;
 import com.mongodb.MongoSocketReadTimeoutException;
 import com.mongodb.ServerAddress;