I'm not sure why anyone has stated this and I realize that the problem has already been solved, but this can easily be fixed using Developer Options in CM11
1) Go to settings> about phone
2) Scroll all the way down to build number and repeatedly tap it until it says something along the lines of "You are now a developer"
3) Go back to settings then go to developer options
4) A little less than halfway down is an option called 'Development shortcut'. Tick that box
Now, you can get rid of any pesky notification that can't be swiped away. Simply tap and hold it, then select 'Force close'. This works with any apps running in the background by doing the same thing from the app switcher. Hope this helps!