docs: drop code references to local plan files

tests/BusProNet/ResponseParserTest.php

@@ -194,8 +194,7 @@ class ResponseParserTest extends TestCase
     /**
      * The write answers idadresse + idperson + änderung, not a selection tree - the shape
      * createProfileUpdateResponse() reads. It used to be routed to the CRM attribute parser, which
-     * would have returned an empty response with every role flag false
-     * (.ddev/plans/buspro-crm-selection-write.md).
+     * would have returned an empty response with every role flag false.
      */
     public function testParseCrmSelectionWriteResponse(): void
     {