Bug 309837 [Workbench] Improve startup performance by fixing the cache for feature ini's
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
activateEditorAction = null;
        maximizePartAction = null;
        minimizePartAction = null;
        switchToEditorAction = null;
        quickAccessAction.dispose();
        quickAccessAction = null;
        backwardHistoryAction = null;
        forwardHistoryAction = null;
        undoAction = null;
        redoAction = null;
        quitAction = null;
        goIntoAction = null;
        backAction = null;
        forwardAction = null;
        upAction = null;
        nextAction = null;
        previousAction = null;
        openWorkspaceAction = null;
        projectPropertyDialogAction = null;
        newWizardAction = null;
        newWizardDropDownAction = null;
        importResourcesAction = null;
        exportResourcesAction = null;
        buildAllAction = null;
        cleanAction = null;
        toggleAutoBuildAction = null;
        buildWorkingSetMenu = null;
        quickStartAction = null;
        tipsAndTricksAction = null;
        showInQuickMenu = null;