Evernote calls it focusing on its core business. Others might see it as signs of trouble. The once popular startup, considered to be a unicorn in Silicon Valley, has shut down many of the products and services it has considered dead weight. The latest to get the ax isn't even a product technically speaking but a marketplace. Evernote Market, the place where you can order and buy physical products and objects related to the note-taking service, is shutting down, freeing Evernote to concentrate on what it does best.