remove broken postgresql debugging link

mattmakai · mattmakai · commit ffb25075b9c0 · 2019-07-14T08:14:09.000-04:00
diff --git a/content/pages/01-introduction/06-community.markdown b/content/pages/01-introduction/06-community.markdown
@@ -114,8 +114,7 @@ the community.
   and conferences.
 
 * There are many large active online communities on 
-  [Reddit](https://www.reddit.com/r/python), 
-  [Google Plus](https://plus.google.com/communities/103393744324769547228)
+  [Reddit](https://www.reddit.com/r/python) and
   [IRC channels](https://freenode.net/) such as #python, #python-dev
   and #distutils.
 
diff --git a/content/pages/03-data/02-postgresql.markdown b/content/pages/03-data/02-postgresql.markdown
@@ -218,10 +218,6 @@ The post is an inside look at the evolution of Braintree's usage of the database
   [how to back up a PostgreSQL database hosted on an Amazon Web Services EC2 instance](http://www.n2ws.com/blog/how-to-backup-your-aws-cloud-based-postgresql-database.html)
   if managing your own database on a cloud server is your preferred setup.
 
-* [How to fix undead PostgreSQL queries](https://tech.zalando.com/blog/hack-to-terminate-tcp-conn-postgres/)
-  shows a bit of a hack for what to do when you can't kill certain 
-  PostgreSQL queries.
-
 * [Is bi-directional replication (BDR) in PostgreSQL transactional?](http://sdf.org/~riley/blog/2016/01/04/is-bi-directional-replication-bdr-in-postgres-transactional/)
   explores a relatively obscure topic with the final result that BDR is
   similar to data stores with eventual consistency rather than consistency
