BI-105913 BI导出性能问题,valueof的性能比较低,大数据量会比较慢，这是之前10.0定制的内容，修改一下

fine-poi/src/main/java/com/fr/third/v2/org/apache/poi/xssf/usermodel/XSSFSheet.java

@@ -408,10 +408,6 @@ public class XSSFSheet extends POIXMLDocumentPart implements Sheet  {
             // throw IllegalStateException if the argument CellRangeAddress intersects with
             // a multi-cell array formula defined in this sheet
             validateArrayFormulas(region);
-
-            // Throw IllegalStateException if the argument CellRangeAddress intersects with
-            // a merged region already in this sheet
-            validateMergedRegions(region);
         }
 
         CTMergeCells ctMergeCells = worksheet.isSetMergeCells() ? worksheet.getMergeCells() : worksheet.addNewMergeCells();