DeleteThemeAlias
Use the DeleteThemeAlias operation to delete the version of the theme
            that the specified theme alias points to. If you provide a specific alias, you delete
            the version of the theme that the alias points to. To use this operation, you need the
            ID of the theme that is using the alias that you want to delete. You can use the
                ListThemes operation to list all themes and their corresponding theme
            IDs.
Following is an example AWS CLI command for this operation.
For more information about the DeleteThemeAlias operation, see DeleteThemeAlias in the Quick Sight API Reference.