Clean old lsif redis-store data on startup.
Created by: efritz
https://github.com/sourcegraph/sourcegraph/pull/8137 had cleaned up all bull data, but did not clean up the node-resque data that came before that.
Created by: efritz
https://github.com/sourcegraph/sourcegraph/pull/8137 had cleaned up all bull data, but did not clean up the node-resque data that came before that.