To remove obsolete or unused components from a managed package and ensure they are not included in security scans:
1. **Delete Unused Components**: Remove any components that are no longer in use from the package entirely. This is the most effective way to ensure they no longer pose a security risk.
2. **Remove Code**: If deletion isn't feasible, remove the code from Visualforce pages, Apex classes, or other components. Simply commenting out the code is not sufficient, as it may still be flagged during the scan.
3. **Thorough Cleanup**: Ensure that all unused or obsolete components are fully removed to avoid unnecessary vulnerabilities being reported.
4. **Document If Necessary**: If components can't be deleted, document the reasons and ensure they aren't invoked or accessible in the application. If unused components are accidentally included in a managed package submitted for AppExchange Security Review, document and explain them in your submission.
5. **Resubmit for Review**: After making the necessary changes, resubmit your package for a security review to confirm that the issue has been resolved.
For more detailed guidance, check out these resources:
- [Packaging Managed Component Deletion](https://developer.salesforce.com/docs/atlas.en-us.packagingGuide.meta/packagingGuide/packaging_managed_component_deletion.htm)
- [Removing Metadata Components](https://developer.salesforce.com/docs/atlas.en-us.pkg2_dev.meta/pkg2_dev/sfdx_dev_dev2gp_remove_md_components.htm)
This process helps maintain a clean and secure package for the security review.