Revert session stats change.

src/queries/analytics/sessions/getSessionStats.ts

@@ -22,21 +22,14 @@ async function relationalQuery(websiteId: string, filters: QueryFilters) {
   return rawQuery(
     `
     select
-      ${getDateSQL('g.created_at', unit, timezone)} as x,
-      count(distinct g.session_id) as y
-    from (
-      select
-        website_event.session_id,
-        min(website_event.created_at) as created_at,
-        count(*) y
-      from website_event
+      ${getDateSQL('website_event.created_at', unit, timezone)} x,
+      count(distinct website_event.session_id) y
+    from website_event
       ${joinSession}
-      where website_event.website_id = {{websiteId::uuid}}
+    where website_event.website_id = {{websiteId::uuid}}
       and website_event.created_at between {{startDate}} and {{endDate}}
-      and event_type = {{eventType}} 
+      and event_type = {{eventType}}
       ${filterQuery}
-      group by website_event.session_id, website_event.created_at
-    ) as g
     group by 1
     `,
     params,