Removed unused imports

Author: SaumilPatel03

sdks/java/io/iceberg/src/main/java/org/apache/beam/sdk/io/iceberg/RecordWriter.java

@@ -22,7 +22,6 @@
 import org.apache.beam.sdk.metrics.Metrics;
 import org.apache.iceberg.DataFile;
 import org.apache.iceberg.FileFormat;
-import org.apache.iceberg.MetricsConfig;
 import org.apache.iceberg.PartitionKey;
 import org.apache.iceberg.Table;
 import org.apache.iceberg.avro.Avro;