refactor(firmware): remove the retired simulation workflow

Remove the retired simulator workspace member, dependencies, workflow
and documentation. Keep the shared flight and hardware crates.

Validation: retirement prefix host check, command-dispatch tests and
book build.

docs/src/logs.md

@@ -78,11 +78,6 @@ named choices to the configurator, so the UI carries no hardcoded field list.
 Only the MAVLink adapter converts the five event levels to the typed Kaptan
 wire enum.
 
-The log ingress is transport-neutral and unfiltered. The tested
-`SitlConfigRuntime` composition applies the configured MAVLink policy when
-fanning an event into that sink and proves `kaptan_log::info!` reaches a
-generated `LOG` payload.
-`kaptan-sitl serve` does not yet attach a file/diagnostic MAVLink link. F722
-images accept the unsigned Kaptan file service on local USB CDC-ACM and their
-directly wired UART; that physical-link assumption does not extend to a shared
+The log ingress is transport-neutral and unfiltered. F722 images accept the
+unsigned Kaptan file service on local USB CDC-ACM and their directly wired UART; that physical-link assumption does not extend to a shared
 or remote MAVLink network.