Question about Outlook Express

I am working on an internet project for a school and they sent me this link: https://cal.veracross.com/sae/events.ics?groups=1776

Because it's used for a an online calendar feed. I made the mistake of clicking on the link and it downloaded and events.ics document that automatically opened in Outlook. I noticed later on that I now have ALL of the calendar events being displayed in my Outlook Calendar feed and I never wanted that or even set it up in Outlook that way. It must have added the Internet calendar feed automatically. 

Now I'm trying to delete that feed and scouring the entire internet but not able to find any support. Some posts say that it's not possible to add internet calendar feeds with Outlook.

Please advise on how I can remove this if possible.

Thank you,

Andrew