How do I remove the Google Chrome notifications bell icon from the Mac OS X menu bar?
edit: The option described below has been removed from Chrome. This should void the question as well as my answer.

Old answer:

In the Chrome Menu Bar under "Chrome -> Hide Notification Icon" you can get rid of the bell without having to go through flags (which doesn't work/exist any more!).
It's the Option one from the bottom (I found the information in a comment on osxdaily):