This was good unique content. Better than what most sites have. I did it for linking, I got links from .edu's and governing bodies from the content. that's how good the content was. But frankly, Google can't tell the difference between good and bad content.
The content was all on topic. However, none of the visitors to the content were buying customers, and none of the buying customers cared about the content.
I may eventually put the content back up on another domain and if it gathers links, use that site as a link feeder to my main site. But back on my main site? Nope - removal has not apparently harmed my rankings and may have helped it.