Remove scalardb-analytics/README

Author: josh-wong

sidebars.js

@@ -1457,11 +1457,6 @@ const sidebars = {
               label: '分析',
               collapsible: true,
               items: [
-                {
-                  type: 'doc',
-                  id: 'scalardb-analytics/README',
-                  label: '概要',
-                },
                 {
                   type: 'doc',
                   id: 'scalardb-analytics-postgresql/scalardb-fdw',