How to delete photos that show share next to them

hi, I have accidentally selected a photo while looking at it and pushed the icloud button from my iphone6 device. I havent it activated so no photo was sent out. Got to delete the photo in question but now all my photos that are stored in my mobile show the message share next to them and I cant perform any action of deleting them. Can you help out? I simply want to delete all photos and start fresh.