Photoshop installs those droplets in your contextual menu as a convenience, but many people just find them annoying...particularly because there are so many of them. They should be located in the Samples/Droplets folder in your Photoshop folder.
The best way to get rid of them is to simply zip the Droplets folder and then delete it, leaving the zip file in Samples. That way if you ever decide you want the droplets, you just unzip the file and they'll all be right where they need to be.