seeds update: remove from supported

[Andreas Hasenack]

While removing[1] sosreport from the server-ship seed (because it's already in server), I got feedback[2] that its entry in the "support" file might be redundant as well.

That looks correct, since:
- it was added to support because of [3] #1206106
- sometime later, via bug [4] #1311274, it was added to cloud-image seed
- even later, cloud-image seed got trimmed down in this commit[5]:

commit c95c503ed56567d76b9f49850ccb9a85a29c523e
Author: Scott Moser <email address hidden>
Date: Thu Apr 28 13:51:22 2016 -0400

    closer to removal of cloud-image seed

     - make cloud-image seed include ubuntu-server metapackage
     - move pollinate from cloud-image to server seed
     - remove all packages that are in ubuntu-server
     - add bug comments for the remaining packages (cloud-init, openssh-server)

That is effectively what removed sosreport from the cloud-image seed, because it was included in another one already.

This is as far as I investigated this.

1. https://code.launchpad.net/~ahasenack/ubuntu-seeds/+git/ubuntu/+merge/362996
2. https://code.launchpad.net/~ahasenack/ubuntu-seeds/+git/ubuntu/+merge/362996/comments/944723
3. https://bugs.launchpad.net/ubuntu/+source/sosreport/+bug/1206106/comments/9
4. https://bugs.launchpad.net/cloud-images/+bug/1311274
5. https://git.launchpad.net/~ubuntu-core-dev/ubuntu-seeds/+git/ubuntu/commit/?id=c95c503ed56567d76b9f49850ccb9a85a29c523e

[Bryan Quigley (bryanquigley)]

+1 from me on removing from server-ship and supported, since it's in server..

[Eric Desrochers (slashd)]

As long as it is still installed by default at installation time in order to prevent customers to have to install it manually as an extra steps, when needing support from us.

- Eric

[Christian Ehrhardt  (paelzer)]

FYI server-ship isn't used anymore to build an ISO or anything like it (only server-ship-live is).
We recently migrated everything off server-ship as it will likely go away in the future.