remove uneeded comma from ics also https
remove uneeded comma from ics also https

fixes COMMS-1398 COMMS-1397

Test Plan:
- Create some calendar events with locations
- export to ical (check ticket for screen shots)
- notice no trailing commas
- also notice https

Change-Id: I08f0c187d12e9979b0bbe74b1be16d24e8d301d0
Reviewed-on: https://gerrit.instructure.com/162068
Reviewed-by: Landon Gilbert-Bland <60d9ff23682c863d36b48b4c32c5ce5f434d29c0@instructure.com>
Tested-by: Jenkins
QA-Review: Landon Gilbert-Bland <60d9ff23682c863d36b48b4c32c5ce5f434d29c0@instructure.com>
Product-Review: Steven Burnett <a0b450117c5d20a22d5c4d52bb8ae13adee003d8@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms