Chicago: duplicate events from different sources

[Derek Eder]

one is from Legistar another from the new eLMS

https://puddle.bunkum.us/chicago_council-c21cb25/event/ocd-event~2Fc977edb0-bd79-41dc-acb8-2b5b6dbf713c
https://puddle.bunkum.us/chicago_council-c21cb25/event/ocd-event~2Fe4b9ecc8-3bf4-4cc3-867a-0d9df6717dad

[Forest Gregg]

we use pupa_id to canonically identify events.

so events that we have pulled from both the new system and from legistar will duplicate. we should some database surgery and remove the legistar events and then do a full scrape of events from elms.

[Forest Gregg]

i've fixed this.