How to hide Vibrate status bar icon on CM12?
An alternative would be to use a different theme's status icons. You're using Hexo theme's status icons as it seem at first glance. You can choose to change the whole theme or just the status icons by an other theme's status icons under Settings &rarr; Themes. This answer should help you out.

Try the icons of System (Android) theme or download others themes using Themes app (a system app).

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