[HOTFIX] Remove unnecessary imports from #12944 that broke build

Author: Josh Rosen <joshrosen@databricks.com>

Closes #14499 from JoshRosen/hotfix.

Author: JoshRosen

common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/ShuffleIndexInformation.java

@@ -17,11 +17,6 @@
 
 package org.apache.spark.network.shuffle;
 
-import com.google.common.cache.LoadingCache;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import sun.nio.ch.IOUtil;
-
 import java.io.DataInputStream;
 import java.io.File;
 import java.io.FileInputStream;