deleted obsolete comment (should have been done in c669809)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@684884 13f79535-47bb-0310-9956-ffa450edef68

src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java

@@ -1002,7 +1002,6 @@ public final class TestBugs extends TestCase {
      * Test that we can delete sheets without
      *  breaking the build in named ranges
      *  used for printing stuff.
-     * Currently broken, as we change the Ptg
      */
     public void test30978() {
         HSSFWorkbook wb = openSample("30978-alt.xls");