Fix checkstyle

Author: karuppayya

spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/actions/DeleteOrphanFilesSparkAction.java

@@ -26,7 +26,6 @@
 import java.io.UncheckedIOException;
 import java.net.URI;
 import java.sql.Timestamp;
-import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
@@ -246,7 +245,7 @@ private String jobDesc() {
 
   private SerializableConsumer<Iterator<String>> bulkDeleteFiles(SupportsBulkOperations io) {
     return stringIterator -> {
-      ArrayList<String> paths = Lists.newArrayList(stringIterator);
+      List<String> paths = Lists.newArrayList(stringIterator);
       try {
         io.deleteFiles(paths);
       } catch (BulkDeletionFailureException e) {
@@ -444,14 +443,15 @@ Dataset<String> findOrphanFiles(
     if (orphanFileDF != null) {
       return orphanFileDF;
     }
-    SetAccumulator<Pair<String, String>> conflicts = accumulator();
-    spark.sparkContext().register(conflicts);
+    SetAccumulator<Pair<String, String>> conflictsAccumulator = accumulator();
+    spark.sparkContext().register(conflictsAccumulator);
     Column joinCond = actualFileIdentDS.col("path").equalTo(validFileIdentDS.col("path"));
 
     orphanFileDF =
         actualFileIdentDS
             .joinWith(validFileIdentDS, joinCond, "leftouter")
-            .mapPartitions(new FindOrphanFiles(prefixMismatchMode, conflicts), Encoders.STRING());
+            .mapPartitions(
+                new FindOrphanFiles(prefixMismatchMode, conflictsAccumulator), Encoders.STRING());
     return orphanFileDF;
   }