Fix broken test after merge of master

- update asyncapi version (avoid warning not latest)
- sonar fix (unused constant)

Author: pvdbosch

test/documents/asyncapi3.yaml

@@ -1,4 +1,4 @@
-asyncapi: 3.0.0
+asyncapi: 3.1.0
 info:
   title: Address change events
   version: 1.0.0

test/parser.spec.ts

@@ -73,7 +73,7 @@ describe('OpenAPISchemaParser', function () {
   });
 
   it('should parse valid AsyncAPI3', async function() {
-    const { document, diagnostics } = await coreParser.parse(inputWithValidAsyncAPI3);
+    const { diagnostics } = await coreParser.parse(inputWithValidAsyncAPI3);
     expect(diagnostics).toHaveLength(0);
   });