Why are the attributes not being removed?

Question

npm

I want to remove all [fill] [stroke] [style] attributes from elements that are in the symbol tag whose id starts with "mono". What am I doing wrong?

.pipe(cheerio({
      run: function ($) {
        $('symbol[id^="mono"] [fill]').removeAttr('fill');
        $('symbol[id^="mono"] [stroke]').removeAttr('stroke');
        $('symbol[id^="mono"] [style]').removeAttr('style');
      },
      parserOptions: {xmlMode: true}
    }))