Remove test Security2779Test#noXssInHelpLinkPanel

Help links do not contain tooltips anymore, so it does not make
sense to wait for the tooltips to show up. So this test case
makes no sense anymore.

Author: uhafner

test/src/test/java/jenkins/security/Security2779Test.java

@@ -28,11 +28,6 @@ void setUp(JenkinsRule rule) {
         j = rule;
     }
 
-    @Test
-    void noXssInHelpLinkPanel() throws Exception {
-        noCrossSiteScriptingInHelp("#link-panel a");
-    }
-
     @Test
     void noXssInHelpIconPanel() throws Exception {
         noCrossSiteScriptingInHelp("#icon-panel svg");