docs: drop code references to local plan files

src/BusProNet/ApiClient.php

@@ -146,8 +146,9 @@ class ApiClient
      * "login" switches the password check off, which only works when the request identifies the
      * person by id: both ids are required, and the person id is "idadresseperson" on the way in
      * although the response calls it "idperson". The element order and the single-selection
-     * payload are what BusPro was verified to accept - the art is undocumented, see
-     * .ddev/plans/buspro-crm-selection-write.md before changing the shape.
+     * payload are what BusPro accepted when verified against production (2026-09-25, selection
+     * 1070 toggled off and back on) - the art is undocumented, so re-verify before changing the
+     * shape.
      *
      * Idempotent: setting a selection that is already set answers änderung=True and changes
      * nothing, so a caller may write unconditionally and take isUpdated() as the success check.

src/BusProNet/ResponseParser.php

@@ -54,7 +54,7 @@ class ResponseParser
                         // to be routed to createCrmAttributesResponse(), which walks a
                         // "selektionsmerkmale" node that is absent here and would have returned an
                         // empty response with every role flag false - dead code until something
-                        // sent the art (.ddev/plans/buspro-crm-selection-write.md).
+                        // sent the art.
                         return $this->createProfileUpdateResponse($xml);
                     case 'Adresse_Neu':
                         return $this->createRegistrationResponse($xml);