As the blog post was made by the guy over the FB platform, I can only assume this was a PR move. They wanted to kill an internal service to demonstrate that they're committed to making the platform work for outsiders. "Courses" hasn't been touched in ages (was it even officially an app??) and isn't at all core to the workings of the site (most people stop updating theirs, eventually), so why not?

Wake me up when they drop "Photos."