findbugs: remove implements Cloneable declaration from classes that don't implement a clone method

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1751035 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xssf/streaming/SXSSFSheet.java

@@ -58,7 +58,7 @@ import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorksheet;
 /**
  * Streaming version of XSSFSheet implementing the "BigGridDemo" strategy.
 */
-public class SXSSFSheet implements Sheet, Cloneable
+public class SXSSFSheet implements Sheet
 {
     /*package*/ final XSSFSheet _sh;
     private final SXSSFWorkbook _workbook;

src/scratchpad/src/org/apache/poi/hwpf/model/FileInformationBlock.java

@@ -42,7 +42,7 @@ import org.apache.poi.util.POILogger;
  * </ul>
  */
 @Internal
-public final class FileInformationBlock implements Cloneable
+public final class FileInformationBlock
 {
     public static final POILogger logger = POILogFactory
             .getLogger( FileInformationBlock.class );