[python] Remove broken purls

[usta]

These are all 404

[captn3m0]

A better approach would be to identify the correct package that ought to be used here, and switch to that instead of dropping them all.

A broken link is not necessarily an incorrect PURL, since a PURL -> URL mapping can never be 100% acccurate.

[captn3m0]

https://packages.ubuntu.com/search?keywords=-minimal&searchon=names&suite=all&section=all

packages are called python2.7-minimal
python2-minimal
python3-minimal

[captn3m0]

Some of these are definitely invalid packages, but more care needs to be taken to ensure any valid purls are not dropped.

[captn3m0]

a valid package https://packages.ubuntu.com/search?keywords=python2&searchon=names&suite=all&section=all

[captn3m0]

Note: I have not reviewed the entire list of removals. Please check once and let me know.

[BiNZGi]

We render some purls into urls and the user can click on them. They can return a 404, I assume @usta checked all urls and wants to remove the 404.

For deb/ubuntu it seems that we render this way:
purl: pkg:deb/ubuntu/python2 -> https://launchpad.net/ubuntu/+source/python2

Opening this url returns a 404.

On https://packages.ubuntu.com/python2&exact=1 it returns packages for focal and jammy. In the other distributions the package seems not to be there.

I suggest to change the url pattern for deb/ubuntu purls.