Remove unused endOfData() call in close method

Remove endOfData() call in close method.

Author: tkaymak

runners/spark/4/src/main/java/org/apache/beam/runners/spark/structuredstreaming/io/BoundedDatasetFactory.java

@@ -284,7 +284,6 @@ public SourcePartitionIterator(SourcePartition<T> partition, Params<T> params) {
     @SuppressWarnings("nullness") // ok, reader not used any longer
     public void close() throws IOException {
       if (reader != null) {
-        endOfData();
         try {
           reader.close();
         } finally {