Online Workshops Calendar - Remove some content in mobile, list view and modal pop-up

[kathrynwp]

Summary

On the Online Workshops calendar page, on smaller screens and in the list view, we should remove some information that doesn't need to be there.

To replicate

1. While previewing the new theme, use the browser inspector to simulate a small mobile device, or use a real mobile device
2. Visit https://learn.wordpress.org/online-workshops/
3. Note that the following unnecessary/non-functional fields:

Meets: Does not repeat
Location: # 
View recording

4. Repeat the above steps on a wider screen, with the calendar set to List view.
5. Observe the same unnecessary fields:

Expected

Unless I'm mistaken, these three fields should not appear in the mobile view or in list view. They do not appear in the current (to be retired) theme, either.

[kathrynwp]

Just noticed that Meets: Does not repeat should also be removed from the calendar pop-up.