remove unnecessary cast

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1890631 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/poi-ooxml/src/main/java/org/apache/poi/xssf/extractor/XSSFExcelExtractor.java b/poi-ooxml/src/main/java/org/apache/poi/xssf/extractor/XSSFExcelExtractor.java
index 43c9dcf..b78145d 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xssf/extractor/XSSFExcelExtractor.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xssf/extractor/XSSFExcelExtractor.java
@@ -141,8 +141,7 @@
             }
 
             // Rows and cells
-            for (Object rawR : sheet) {
-                Row row = (Row)rawR;
+            for (Row row : sheet) {
                 for(Iterator<Cell> ri = row.cellIterator(); ri.hasNext();) {
                     Cell cell = ri.next();