REPORT-70032 & REPORT-70020 poi升级适配

fine-poi/src/main/java/com/fr/third/v2/org/apache/poi/xssf/streaming/SheetDataWriter.java

@@ -319,7 +319,6 @@ public class SheetDataWriter implements Closeable {
                     //XSSFRichTextString rt = new XSSFRichTextString(cell.getStringCellValue());
                     RichTextString rt = cell.getRichStringCellValue();
                     int sRef = _sharedStringSource.addSharedStringItem(rt);
-                    int sRef = _sharedStringSource.addSharedStringItem(rt);
 
                     writeAttribute("t", STCellType.S.toString());
                     _out.write("><v>");