Add missing test file for bug #48779

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@948752 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFBugs.java

@@ -17,7 +17,6 @@
 
 package org.apache.poi.xssf.usermodel;
 
-import java.awt.peer.SystemTrayPeer;
 import java.util.List;
 
 import org.apache.poi.POIXMLDocumentPart;