Remove unused threat monitoring mock data

What does this MR do and why?

Alexander Turinske authored 2 minutes ago

• update one translation to match namespaces

Screenshots or screen recordings

N/A because this is all mocs

How to set up and validate locally

1. Navigate to a project => Security & Compliance => Policies
2. Verify

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #352287 (closed)