Invalid operator `some` in survey options Smart Search filter

[richardolsson]

Description

Smart Search has a filter for finding people based on survey options (survey_option). The UI for configuring this filter has a "some" option, which is not valid and should be removed.

Steps to reproduce

1. Go to https://app.dev.zetkin.org/organize/1/people
2. Create a new list
3. Configure the list using Smart Search
4. Click "Add/remove people"
5. Add a filter based on "Responses to checkbox questions"
6. Click the operator dropdown

Expected Behaviour

The options should be "all", "any" and "none".

Actual Behaviour

The options are "all", "any", "none" and "some" (the last of which is invalid).

Screenshots (if you have any)

[helihard]

I'm on it.