[Merge] lp:~kdub/content-hub/mir-deprecations into lp:content-hub

[Ken VanDine]

Review: Needs Fixing

Please remove the changelog entry.  Otherwise it looks good.  You can run through the manual test plan at https://wiki.ubuntu.com/Process/Merges/TestPlan/content-hub
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https://code.launchpad.net/~kdub/content-hub/mir-deprecations/+merge/317770
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