Google Hangout links

Allen, the plugin is unable to control the ‘free’ content of the event descriptions that are in the ics file. Ideally you would control that from the data input or the providing application.

All I can suggest is:
1) use css to maybe hide links in the event descriptions. Of course that would hide all.
2) maybe write an addon to preprocess the ics file and somehow use regex to find the google hangout stuff and remove it from the file. THere are two addons that you could look at to give you a starting point.
https://icalevents.com/downloads/custom-ics-fields-addon/
https://icalevents.com/downloads/amr-ics-custom-filter/