如何从 Vega Lite 图表中删除轴线

我想从下面的 vega-lite 图表中删除/隐藏轴线。我尝试将颜色更改为空（如下所示）或其他颜色，但这不起作用。

https://vega.github.io/editor/#/gist/fc799bc9f7a8f28b8f1f2ec84673e965/VL https://vega.github.io/editor/#/gist/fc799bc9f7a8f28b8f1f2ec84673e965/VL带轴线.json

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "description": "A simple bar chart with embedded data.",
  "data": {
    "values": [
      {"responseType": "Yes", "proportion": 28},
      {"responseType": "No", "proportion": 7}
    ]
  },
  "mark": "bar",
  "encoding": {
    "y": {
      "field": "responseType",
      "type": "nominal",
      "title": null,
      "axis": {"axisColor": null, "grid": false, "ticks": false}
    },
    "x": {
      "field": "proportion",
      "type": "quantitative",
      "title": "% of Responses",
      "axis": {"axisWidth": "100", "grid": false, "ticks": false}
    }
  }
}

domain隐藏轴线，所以设置"axis": {"domain": false, "grid": false, "ticks": false}对于 x 和 y 都会生成此图表：

如果您还添加"config": {"view": {"stroke": null}}作为顶级属性，您可以摆脱灰色轮廓：

在 Vega 编辑器中打开图表 https://vega.github.io/editor/#/url/vega-lite/N4Igxg9gdgZglgcxALlANzgUwO4tAZwBcAnCAa0xSgFcAbWgXwYBoQASfMAC0wFsBDFCC6FCAB3zIA9FLSYE-AHQI4hLtQBGiuBCmceA2fP4BaWqsyyArIoBW+aCFYATTJ2JwxhHVCEBBAAJ8OF4xWkwAjX5iAO5owgDsVS4Avg1MZ1dnAOd+QiUnEFz8vBA0flpqNxQAbVBiNzFofEwAFQBPMUpkEABNatYxUibib0dkACYADhZ6xua2zu6QADkIQqGIEbHfZAB2BgBdFhABYjIhKOJCzChIZzgoJFQQdtL4TFpnIQb8JqgWh0uoVCEshFAILxHhUQapwlQ6LRWPwAB5wfClZyQ-iPFAwCotVgIDzfZD42iEkDeMBkDFkgmYJisFHvLBfISbbY+EFgnoAR2o-Cg3ny3jksMI8J6AFIAhAYAEAErzAEDECo9GY7G4+kUzBEkl4hmsam0o16phMIA