Remove note about port being removed (#19263)

Some things require a port (eg. `flutter attach`) and will forward it on to the device, so we shouldn't force clients to parse it out of a uri.

packages/flutter_tools/doc/daemon.md

@@ -106,7 +106,7 @@ This is sent when an app is starting. The `params` field will be a map with the
 
 #### app.debugPort
 
-This is sent when an observatory port is available for a started app. The `params` field will be a map with the fields `appId`, `port`, and `wsUri`. Clients should prefer using the `wsUri` field in preference to synthesizing a uri using the `port` field (`port` will be removed in a future version of the protocol). An optional field, `baseUri`, is populated if a path prefix is required for setting breakpoints on the target device.
+This is sent when an observatory port is available for a started app. The `params` field will be a map with the fields `appId`, `port`, and `wsUri`. Clients should prefer using the `wsUri` field in preference to synthesizing a uri using the `port` field. An optional field, `baseUri`, is populated if a path prefix is required for setting breakpoints on the target device.
 
 #### app.started