segmentio/analytics.js-integrations — pull request #192 by ianstormtaylor (2014-06-05 03:12:00+00:00)
Title: mixpanel: delete reserved properties to avoid conflicts

If a user was sending one of Mixpanel's properties we would send it on. This is especially bad for `token` which would mean the event would never hit Mixpanel, or `distinct_id` which would mean that it would be sent as a different user. So this pull request changes it so we delete them.

cc @calvinfo