Revert "Update suitesparse url"

[ViralBShah]

Reverts #43046

[DilumAluthge]

I agree that the revert is the correct short-term solution.

In the long-term, perhaps we could ask the SuiteSparse authors if they could set up HTTPS on their website?

[ViralBShah]

@DrTimothyAldenDavis - is it possible to have https://suitesparse.com work as well?

[DrTimothyAldenDavis]

I'd have to pay extra for it, on my own. This URL is one I one personally, and is a forward to my current research page at A&M, which is https://people.engr.tamu.edu/davis/suitesparse.html . The easiest thing to do if you need https is to just use that link instead of http:https://suitesparse.com.

[ViralBShah]

You can make it do free https by using GitHub pages to host it and have an http redirect to your existing page. May not be worth the effort though.

In any case we are just using your University page directly since browsers don't like http URLs nowadays.