Needlessly IndigoWyrd. There aren't any other examples.
And others have no counterargument. There was no need to remove them, it was an oversight that needs to be corrected. Simple.
As M00ka pointed out, you keep making the claim that it was "needless", but, and to reinforce the point, you cannot demonstrate that this was, in fact, needless. You have not seen the Cobra Engine code, so you cannot say, with certainty, that there was not a definitive need to remove and replace this chunk of code with the new code that enables the functionality of the FSS.
Here is a Genuine Needless Removal:
https://answers.microsoft.com/en-us...ndows-10/5196a147-0e17-40ec-9ba1-ea27b46388ac
For reasons undisclosed, at some indeterminate point in time Microsoft removed the Calculator application from Windows 10. This was not given in any update patch notes, it was simply done. And it was done in such as way as to leave Windows convinced said application was still installed. Ultimately this means a trip to the Windows Store, where you will see, regardless of your desires, advertisements for other Microsoft products, as well as other, similar applications from other partner sources and 3rd party sources.
I will stop you at this point, before you get over excited and point out that "they did provide a way to put it back." because that is not the point. There was NO reason for its removal in the first place - unlike the Charms of Windows Vista, which were removed because they were ultimately shown to be major security issue. The Calculator application was simply removed. There was no code-base issues, no operating problems, no security risks associated with it nor was anything offered or installed as a replacement for it.
The ADS was "removed", in the sense that it was transformed, into a non-module "Discovery Scanner" now built in to all ships. It's functionality was changed. Instead of providing a myopic gods-eye view of an entire system, it provided a highly detailed view of each body in the system, one body at a time. Binoculars were replaced by a high-powered telescope.
I still get that some people have a harder time with change than others. I kind of miss the big block of ice being delivered to my home every Wednesday... even though I don't really have room for it, or need of it in my deep well freezer these days.
I guess the best we can really compare this situation to is circumcision. I get that you're screaming "put it back", but I question the practicality. This is also something nobody bothered to ask you if you wanted (if it applies to you - it does apply to hundreds of millions around the world), and has some scientific, medical support that demonstrates it is not needless (it has been shown to tremendously reduce the risk of certain cancers), as well as have hygienic benefits.
As noted, unless you actually know the Cobra Engine Code, you cannot claim removal was "needless", much like knowing not only the odds, but the exact conditions that cause those certain forms of cancer.