I imported my Google calendar into Evolution and now I can't find a way to delete the calendar. How can I delete it?
I was having a similar issue, and found that I could delete calendars if I shut down the clock applet first:
1) Go to System>Administration>System Monitor
2) Click on "clock-applet" then "End Process"
Don't restart when prompted to do so. You should now be able to delete your calendars.
To get the clock applet back, you may have to add it back to your panel by right-clicking on it, selecting"Add to panel", then "Clock", and placing it where you want.
In my case, the calendars was shown because I added my Google accounts from the GNOME settings.
When added the accounts, I selected to use them also for the calendars, thinking I could then delete the calendars I didn't need. I then discovered I could not delete the calendars I didn't need from Evolution.
What I did was opening the GNOME settings again, click on the accounts listed there, and deselect Calendar from them.
I didn't need to remove the accounts and re-add them. Once I deselected Calendar from my Google accounts, I just closed Evolution and re-opened it to not see the Google calendars on Evolution.