nixos/syncthing: Remove unnecessary patch note

The breaking change in this patch note has been reverted for now, see #226088.

nixos/doc/manual/release-notes/rl-2305.section.md

@@ -192,8 +192,6 @@ In addition to numerous new and updated packages, this release has the following
   };
   ```
 
-- Many `services.syncthing` options have been moved to `services.syncthing.settings`, as part of [RFC 42](https://github.com/NixOS/rfcs/pull/42)'s implementation, see [#226088](https://github.com/NixOS/nixpkgs/pull/226088).
-
 - `podman` now uses the `netavark` network stack. Users will need to delete all of their local containers, images, volumes, etc, by running `podman system reset --force` once before upgrading their systems.
 
 - `git-bug` has been updated to at least version 0.8.0, which includes backwards incompatible changes. The `git-bug-migration` package can be used to upgrade existing repositories.