fix webclient-sealedInterface

Author: jpfinne

samples/client/others/java/webclient-sealedInterface/api/openapi.yaml

@@ -266,19 +266,4 @@ components:
       required:
       - length
       type: object
-    Animal:
-      oneOf:
-      - $ref: "#/components/schemas/Dog"
-      - $ref: "#/components/schemas/Cat"
-      x-one-of-name: Animal
-    Cat:
-      properties:
-        declawed:
-          type: boolean
-      type: object
-    Dog:
-      properties:
-        bark:
-          type: boolean
-      type: object