I don't think backporting the new defaults to Precise and Trusty would be right for an SRU.
On Precise and Trusty, you can set Unattended-Upgrade::Remove-Unused-Dependencies "true";
This is false by default. Setting it to true will remove *all* unused dependencies after every unattended upgrade.
I don't think backporting the new defaults to Precise and Trusty would be right for an SRU.
On Precise and Trusty, you can set Unattended- Upgrade: :Remove- Unused- Dependencies "true";
This is false by default. Setting it to true will remove *all* unused dependencies after every unattended upgrade.