If you want to remove the grey bars in tables it can easily be done like this.

{{:2021-05-04_14-26.png?600|}}

==== 1. Click explore chart ====

{{:2021-05-04_14-29.png?600|}}

==== 2. Click "Customize" and uncheck "Show cell bars" ====

{{:2021-05-04_14-28.png?600|}}