Changelog cleanup

Author: jeremystretch

docs/release-notes/version-3.0.md

@@ -16,7 +16,6 @@
 
 ### Bug Fixes
 
-* [#5775](https://github.com/netbox-community/netbox/issues/5775) - Enable group synchronization for remote authentication backend
 * [#7167](https://github.com/netbox-community/netbox/issues/7167) - Ensure consistent font size when using monospace formatting
 * [#7226](https://github.com/netbox-community/netbox/issues/7226) - Exempt GraphQL API requests from CSRF inspection
 * [#7228](https://github.com/netbox-community/netbox/issues/7228) - Improve temperature conversions under device status