Remove parsed_license_report feature flag code branches

What does this MR do?

Remove feature flag code branches

This removes the frontend code branches for the parsed_license_report feature flag, and removes unused Vuex store actions/mutations.

Part of #37271 (closed).

Screenshots

N/A; no UI changes, this is a backstage change only.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• [-] Merge request performance guidelines
• Style guides
• [-] Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers