This will make django automatically remove them when we run
squashmigrations. There are still some RunSQL statements which
we will have to take care of manually.
This is a preparatory commit for using isort for sorting all of our
imports, merging changes to files where we can easily review the
changes as something we're happy with.
These are also files with relatively little active development, which
means we don't expect much merge conflict risk from these changes.
This is easy to do, and prevents this feature from getting a server
admin stuck in potentially a pretty uncomfortable way -- unable to
roll back a deploy.
We no longer have a special UI setting and model
field ("emoji_alt_code") for saying users want text-only
emojis. We now instead make "text" be a fifth choice
for "emojiset".
Fixes#7406
Anders Kaseorg
Aman Agrawal
Tim Abbott
Greg Price
Aastha Gupta