Remove/ Redirect URL query string

Example: http://dearearth.net/news/?cbg_tz=240

Plugin site with query string example and explanation: http://plugins.righthere.com/custom-backgrounds/multiple-schedule/?cbg_tz=480

I had come across in the past of a way to remove the unwanted ?cbg_tz=240 which is appended to all the URL. This seems to be affecting my analytics and creating dupes wth/ without the string…

I believe it’s fairly simple with an .htaccess edit. Anyone have the .htaccess settings which would accomplish this task?

Thanks!