[bug-62807] fix typo in XSLFTableCell#removeBorder

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1843180 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFTableCell.java

@@ -190,7 +190,7 @@ public class XSLFTableCell extends XSLFTextShape implements TableCell<XSLFShape,
             break;
         case right:
             if (pr.isSetLnR()) {
-                pr.unsetLnB();
+                pr.unsetLnR();
             }
             break;
         default: