How to remove series value from hover tooltip apex charts pie

You can customize the tooltip by providing formatters. In this case, you'll want to override both the title (seriesName) and the y value label. In place of the y value, return a blank string.

You'll need to provide a formatter for the title as well because not doing so will default to the series title being shown followed by a colon.

  tooltip: {
    y: {
      formatter: function(val) {
        return ''
      },
      title: {
        formatter: function (seriesName) {
          return seriesName
        }
      }
    }
  }