Remove left-over PageCache stuff

LayoutTests/batterystatus/script-tests/event-after-navigation.js

Index: LayoutTests/batterystatus/script-tests/event-after-navigation.js
diff --git a/LayoutTests/batterystatus/script-tests/event-after-navigation.js b/LayoutTests/batterystatus/script-tests/event-after-navigation.js
deleted file mode 100644
index 2338d2e5c3274cdd6746d7b9b1745c705d368e67..0000000000000000000000000000000000000000
--- a/LayoutTests/batterystatus/script-tests/event-after-navigation.js
+++ /dev/null
@@ -1,13 +0,0 @@
-description('Tests for a crash where an event is fired after the page has been navigated away when the original page is in the page cache.');
-
-if (window.testRunner)
-    testRunner.overridePreference('WebKitUsesPageCachePreferenceKey', 1);
-else
-    debug('This test can not be run without the testRunner');
-
-document.body.onload = function() {
-    navigator.webkitBattery.addEventListener('chargingchange', function() { } );
-    window.location = "resources/event-after-navigation-new.html";
-}
-
-window.jsTestIsAsync = true;