DOCSP-45842 Removes line suggesting max num of mongos routers (#11882)

Author: jwilson-mdb

source/core/sharded-cluster-components.txt

@@ -67,8 +67,7 @@ For shard-level high availability, either:
 
 :binary:`~bin.mongos` routers communicate frequently with your config 
 servers. As you increase the number of routers, performance may degrade. 
-If performance degrades, reduce the number of routers. Your deployment 
-should not have more than 30 ``mongos`` routers.
+If performance degrades, reduce the number of routers.
 
 The following diagram shows a common sharded cluster architecture used
 in production: