Remove non-canonical docs versions from sitemap.xml

[tobiasmcnulty]

It looks like we may be sending confusing signals to Google by putting old docs versions in sitemap-<lang>.xml, but then telling it only one of those versions is canonical:

Google's commentary on this error: https://support.google.com/webmasters/answer/7440203#submitted_url_not_selected_as_canonical

[tobiasmcnulty]

I've also taken a snapshot of the index coverage report today (3/2/19) here, with some commentary and links to other, related issues: https://docs.google.com/spreadsheets/d/1l86YAEcw5CbvivuY-ZN81oy75Nh7T9g0eJX0sZ8Jww0/edit#gid=0

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[carltongibson]

@tobiasmcnulty — Could I ask you to confirm whether this still applies? (It looks quite addressable I think 🤔)

[tobiasmcnulty]

It looks like Google has changed the error message here, but maybe this is fixed? There are far fewer of the similar error, and none for URLs of the documentation.

That said, there appears to be a related issue with the 'docs' site (and possibly others) serving URLs that aren't meant for that site. We could rename this issue, leave it as is, or file a new one?

https://docs.djangoproject.com/foundation/donate/ | Oct 5, 2022 https://docs.djangoproject.com/foundation/conferences/ | Sep 26, 2022 https://docs.djangoproject.com/community/logos/ | Sep 22, 2022 https://docs.djangoproject.com/foundation/corporate-membership/ | Sep 19, 2022 https://docs.djangoproject.com/community/desktops/ | Sep 10, 2022 https://docs.djangoproject.com/community/badges/ | Sep 4, 2022 https://docs.djangoproject.com/foundation/cla/ | Aug 29, 2022 https://docs.djangoproject.com/foundation/faq/ | Aug 28, 2022 https://docs.djangoproject.com/foundation/records/minutes/2014-10-30/ | Aug 27, 2022 https://docs.djangoproject.com/foundation/records/minutes/2018-08-09/ | Aug 22, 2022 etc.

[arexnnnn]

/assign