(DOCSP-15543): Remove inaccurate advice for read-heavy apps

Author: jeff-allen-mongo

source/administration/analyzing-mongodb-performance.txt

@@ -154,9 +154,6 @@ If there are numerous concurrent application requests, the database may have
 trouble keeping up with demand. If this is the case, then you will need to
 increase the capacity of your deployment.
 
-For read-heavy applications, increase the size of your :term:`replica set` and
-distribute read operations to :term:`secondary` members.
-
 For write-heavy applications, deploy :term:`sharding` and add one or more
 :term:`shards <shard>` to a :term:`sharded cluster` to distribute load among
 :binary:`~bin.mongod` instances.