Ubuntu mirrors cleaning process

[Vivien GUEANT - LaFibre.info]

Hello,

I don't know if this is the correct process, I opened the bug 
https://bugs.launchpad.net/ubuntu/+bug/1918137 to ask to delete the many 
junk files on the mirrors. I don't know how to attribute it to the 
cleaning team.

The different points :

- The i386 package cleaning process seems incomplete: There are still 
i386 boot images for Ubuntu 20.10 or Ubuntu 21.04 Hirsute Hippo: 
http://archive.ubuntu.com/ubuntu/dists/hirsute/main/installer-i386/current/images/netboot/

- The i386 architecture is always listed for Ubuntu 21.04 Hirsute Hippo: 
https://launchpad.net/ubuntu/+mirror/bouygues-telecom

- Files in the "indices" folder 
(http://archive.ubuntu.com/ubuntu/indices/) are not cleaned up when a 
distribution is deleted from the archive: there are files from Ubuntu 
5.04: Hoary Hedgehog!

In order to reduce the environmental footprint of the mirrors which 
contains these unnecessary files, which are copied in thousands of 
copies, would it be possible to do some cleaning?

Is-it necessary to keep in the mirrors Ubuntu 12.04 LTS Precise 
Pangolin? Ubuntu Extended Security Maintenance ended since April 2019 
and the mirror files have not changed since may 2018: 
http://archive.ubuntu.com/ubuntu/dists/precise-security/

Would it be possible to move unsupported versions, like Ubuntu 12.04, to 
http://old-releases.ubuntu.com/ubuntu/ ?

Thank you in advance for a little cleaning, which might avoid upgrades 
to the mirror servers (actual size of Ubuntu archives is 1.6 TB).

Regards,
Vivien.