Open the Photos app and see if you have selected the back up option to Google Photos. Just disable that and that should stop the back up to Google Photos. I don't recommend doing it, however, but to each their own. Just keep a back up of your pictures elsewhere, OK? You can see how many 'OMG I lost my phone/it got damaged/it got stolen/aliens picked it up and now I lost my pictures' posts are on these forums.
If what you want is to remove the location information, then you have to de-activate the Geolocation option in your camera settings. If you choose to have the location in your local file but want to strip the back up in Photos from that information, you can also select that in the Photos app settings and ask it to remove all geolocation data from your backed up pictures.