Originally reported on the Gutenberg plugin support forum at https://wordpress.org/support/topic/collegehumor-should-be-removed/ by slkfsdf8y34ljhsfsdfkuhfkl84hj:

CollegeHumor block should be removed as the site is no longer an independant website, they now redirect it to YouTube.

I always wondered why it was a block anyway, there are so much more popular websites comparing to that one that were not added.