fix(ci-broker.md): drop unused embedded file shutdown.json

Signed-off-by: Lars Wirzenius <liw@liw.fi>

NEWS.md

@@ -4,6 +4,37 @@ This file summarizes the user-visible changes to `radicle-ci-broker`
 between releases.
 
 
+## Version 0.3.0, released 2024-07-xx
+
+This is the third release. It breaks all existing installations.
+
+### Bug fixes
+
+* The CI broker now parses Git ref names for node identifiers more
+  correctly.
+
+### New or changed features
+
+* CI broker logging continues to be inconsistent and helpful mainly to
+  those developing the CI broker itself. Some logging has been
+  removed, to avoid so called logspam.
+
+* The code has been refactored a lot, for simplicity. This should be
+  invisible to others, especially the adapter implementations, but
+  just in case, be aware something externally visible may have changed
+  inadvertently.
+
+* The `BrokerEvent::is_allowed` method is no longer exposed in the CI
+  broker public API. If you need it, let us know.
+
+* The CI broker now logs the executable filename of the adapter it
+  runs.
+
+* The acceptance criteria for the CI broker are now documented in more
+  detail in the subplot (see `ci-broker.md` and the
+  [Subplot](https://subplot.tech/) software).
+
+
 ## Version 0.2.0, released 2024-06-06
 
 This is the second release.

ci-broker.md

@@ -73,27 +73,6 @@ changed in repository.
 }
 ~~~
 
-## A shutdown event
-
-This asks the CI broker to shut down cleanly.
-
-~~~{#shutdown.json .file .json}
-{
-  "type": "refsFetched",
-  "remote": "z6MkgEMYod7Hxfy9qCvDv5hYHkZ4ciWmLFgfvm3Wn1b2w2FV",
-  "rid": "rad:zwTxygwuz5LDGBq255RA2CbNGrz8",
-  "updated": [
-    {
-      "skipped": {
-        "name": "shutdown",
-        "oid": "0000000000000000000000000000000000000000"
-      }
-    }
-  ]
-}
-~~~
-
-
 ## Set rid in `refsFetched` event
 
 This is a helper script that reads a `refsFetched` event and changes