Allow user to delete a subscription via slash command

[DHaussermann]

Currently there is no way to Delete or deactivate a subscription once you've created it in the channel.

Since this functionality does not exist, and space/page IDs can't be edited the only way to stop the events is to remove all events from the existing subscription.

We should be able to delete subscriptions via a slash command.

[DHaussermann]

Disregard this issue. I forgot about the unsubscribe.

[aaronrothschild]

@DHaussermann Had me worried for a sec... ;)

[DHaussermann]

@aaronrothschild same! I was baffled. I knew there was a way to remove them during the first round of testing but I couldn't see it anymore :)