remove unnecessary config steps

advocacy_docs/pg_extensions/system_stats/configuring.mdx

@@ -2,31 +2,11 @@
 title: Configuring system_stats
 navTitle: Configuring
 ---
-
-1. Add `system_stats` to the `shared_preload_libraries` parameter: 
-
-   ```ini
-   shared_preload_libraries = 'system_stats'
-   ```
-
-   !!! Note
-   If `shared_preload_libraries` has other extensions, then you can add `system_stats` to the list. The order doesn't matter. 
-   !!!
-
-1. Add these changes to `postgresql.conf`:
-
-  ```shell
-  wal_level = logical
-  max_replication_slots = 1 # ... or add 1 to the current value.
-  ```
-
-1. Restart Postgres.
-
 1. Create the `system_stats` extension in your database:
 
   ```shell
   CREATE EXTENSION system_stats;
   ```
-!!! Note 
-    When upgrading a database cluster with `system_stats` installed (either using `pg_dumpall`/`pg_restore` or `pg_upgrade`), make sure that the new cluster has `system_stats` in `shared_preload_libraries` before you upgrade. Otherwise the upgrade fails.
+
+No other configuration steps are required.
 

advocacy_docs/pg_extensions/wal2json/configuring.mdx

@@ -6,14 +6,7 @@ navTitle: Configuring
 
   ```shell
 wal_level = logical
-    #
-    # these parameters only need to set in versions 9.4, 9.5 and 9.6
-    # default values are ok in version 10 or later
-    #
-max_replication_slots = 10
-max_wal_senders = 10
   ```
 
-!!! Note 
-    When upgrading a database cluster with `wal2json` installed (either using `pg_dumpall`/`pg_restore` or `pg_upgrade`), make sure that the new cluster has `wal2json` in `shared_preload_libraries` before you upgrade. Otherwise the upgrade fails.
+No other configuration steps are required.