Android - How do I skip an Android system update and stop its notifications?

I just spoke to Google directly. The Nexus 5 under settings, apps has something called Google Play services. Not store. If you uncheck the notification box in Google Play services and restart the phone the notification for the Android system updates will stop in the notification bar. Worked like a charm!

If you happen to be rooted, you should be able to install Disable Services and find the SystemUpdateService under Google Play Services disable Google Services Framework.

I figured it out :D :D

If you get the notification and have not yet downloaded the update. Simply Press the notification in the notification bar and Hold for 10 Seconds. It will give you two options. Click on the Settings button. From Settings select "Turn off notifications update" :)