Remove page restrictions via REST-API

@DirkEyfrig
Sorry, the correct body format should be:

{
  "results": [
    {
      "operation": "read",
      "restrictions": {
        "user": {
          "results": []
        },
        "group": {
          "results": []
        }
      }
    }
  ]
}

This time I’ve tested it using the REST API Browser on a Confluence 8.5.0
And if you also want to remove edit restrictions:

{
  "results": [
    {
      "operation": "read",
      "restrictions": {
        "user": {
          "results": []
        },
        "group": {
          "results": []
        }
      }
    },
    {
      "operation": "update",
      "restrictions": {
        "user": {
          "results": []
        },
        "group": {
          "results": []
        }
      }
    }
  ]
}