When downloading the Active Doc 3scale adds "schemes":["http"]" at the end

Current behaviour:

• Go to Product > Active Docs
• Click the link under the name of the specification, i.e.
  https://3scale-admin.<wildcard-domain>/admin/api_docs/services/1.json
• The content of the spec has at the end the additional field:

  },
    "schemes": [
      "http"
    ]
  

  which is no longer supported for OAS 3.X.

Expected behaviour:
The spec should not include the field "schemes":["http"]".