Many time an operating system is updated and some useful features are found missing in the update like Clear all option in notification panel on Android L. It may be fixed in final release but till then, CWM developer Koushik Dutta, has developed an application named Clear Notification.
Clear Notification brings back the Clear All button back and into Notification Panel and user can clear all notifications with a single tap. These is the power of open-source environment where small niggles can be fixed easily by developers withing minutes.
This button will save the Android L users precious time and will save Google from their frustration. If you are running developer preview go ahead and download the application from below.
Download- Clear Notification