Remove views per session since we want to calc that in Looker as a measure

Author: kwindau

sql/moz-fx-data-shared-prod/mozilla_org_derived/blog_performance_v1/query.sql

@@ -49,13 +49,11 @@ SELECT
     event_name IN ('link_click', 'download_click', 'scroll', 'cta_click', 'click', 'search')
   ) AS nbr_key_events,
   SUM(page_views) AS page_views,
-  COUNT(DISTINCT(ga_session_id || ' - ' || user_pseudo_id)) AS nbr_sessions,
-  SAFE_DIVIDE(
-    SUM(page_views),
-    COUNT(DISTINCT(ga_session_id || ' - ' || user_pseudo_id))
-  ) AS views_per_session
+  COUNT(DISTINCT(ga_session_id || ' - ' || user_pseudo_id)) AS nbr_sessions
 FROM
   staging
+WHERE
+  event_name = 'page_view'
 GROUP BY
   event_date,
   page_title

sql/moz-fx-data-shared-prod/mozilla_org_derived/blog_performance_v1/schema.yaml

@@ -19,7 +19,3 @@ fields:
   type: INTEGER
   mode: NULLABLE
   description: Number of Sessions
-- name: views_per_session
-  type: FLOAT
-  mode: NULLABLE
-  description: Views per Session