Why Google Analytics tracker on website without having an analytics plugin?!

Hello,

I did a website with wordpress and I have ghostery in Chrome and Firefox and it shows a Google Analytics tracker on the site although I have no Analytics Plugin installed! When I check the cookies, there are several set that relate to analytics (_utmt, _utma, _utmb, _utmc, _utmz).

I only have Yoast SEO and some plugins for security, backup, slider, spam-shield and form. So I don’t understand what is setting these cookies?! Has anybody an idea where this could be coming from without having the plugin installed??
The only thing different I can see about the analytics cookies in the developer console is that they are set by the domainname without www. prefix and all others show domain name with www.
It’s driving me nuts…and I can’t find any information on this issue :/

Thanks!