We use a custom Google Maps filter to show you where you can use Flux. Sometimes this filter remains 'active', even after you've exited Google maps.
To remove this, you'll need to access settings -> Your places -> Maps -> See all Maps from within the Google Maps app or via a browser. You should then have an option to remove the Flux store locations from your view.
If that doesn't work, you can also remove the filter via your maps history. Simply visit settings -> Maps History to see the filter and close it.