Remove unused TagSweeper class

Description

In the upgrade to Rails 4.0, the contents of the TagSweeper class were moved into the Tag class, and the sweeper was disabled. As a result, the TagSweeper class is no longer needed (it has 0% coverage on codecov.io), and can be safely deleted.

No manual QA required.

DeployedToBeta

Assignee

ticking instant

Reporter

ticking instant

Roadmap

Tags

Priority

Low

Affects versions

Fix versions

Components

BackEnd

Difficulty

Medium

Milestone

Internal 0.9