Hello,

You can disable the sidebar globally in Theme Settings -> General layout -> in the field “Sidebar position” select “Without”

https://monosnap.com/file/IZDKtzw1CZLdfARpPlBplehLS5FWyY

In order to remove the contents of the sidebar go to Appearance -> Widgets -> in the field “Main Widger Area” you can delete widgets.

https://monosnap.com/file/1HXrQbxgDI3bTeY9JpIcm06xmzYl6W

https://monosnap.com/file/NUnL4rLMCiLEzD8hlcAUxNpfJST0z9

Kind Regards