The property
`Vulnerabilities::FeedbackEntity#destroy_vulnerability_feedback_dismissal_path`
is no longer referenced in the code base and can be removed.
The last code referencing this property was removed by
!125362

The motivation for this is the removal of all uses of route helpers
referencing the deprecated controller
`Projects::VulnerabilityFeedbackController`.
This is a prerequisite for the removal of the controller itself as
described in #419214