Remove beforeload events.

LayoutTests/http/tests/security/beforeload-iframe-client-redirect.html

Index: LayoutTests/http/tests/security/beforeload-iframe-client-redirect.html
diff --git a/LayoutTests/http/tests/security/beforeload-iframe-client-redirect.html b/LayoutTests/http/tests/security/beforeload-iframe-client-redirect.html
deleted file mode 100644
index b14266c8be1dcc5fc5c5faf84df27f18bd594deb..0000000000000000000000000000000000000000
--- a/LayoutTests/http/tests/security/beforeload-iframe-client-redirect.html
+++ /dev/null
@@ -1,16 +0,0 @@
-<script>
-if (window.testRunner) {
-    testRunner.dumpAsText();
-    testRunner.waitUntilDone();
-}
-
-window.addEventListener('message', function(evt) {
-    if (window.testRunner)
-        testRunner.notifyDone();
-}, false);
-</script>
-This test produces output in the console.  Only the initial URL should be logged.
-<iframe
-  src="http://127.0.0.1:8000/security/resources/client-redir.html?url=http://localhost:8000/security/resources/post-done.html"
-  onbeforeload="console.log(event.url)">
-</iframe>