Remove tool that shut down

[natejlong]

https://feedwrangler.net/welcome.html

I will be shutting down Feed Wrangler next year, on March 1, 2023.

It is no longer accepting new signups.

What is this RSS project?

Describe features.

What's the difference between this RSS project and similar ones?

Enumerate comparisons.

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Anyone who agrees with this pull request could vote for it by adding a :+1: to it, and usually, the maintainer will merge it when votes reach 5.