DOCSP-39287 Fault tolerance - Temporary arbiter usage (#198)

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- [DOCSP-39287](https://jira.mongodb.org/browse/DOCSP-39287)
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[STAGING](https://preview-mongodbkanchanamongodb.gatsbyjs.io/ops-manager/DOCSP-39287/tutorial/prepare-for-maintenance/#fault-tolerance)
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Author: kanchana-mongodb

source/tutorial/prepare-for-maintenance.txt

@@ -63,13 +63,6 @@ loses the majority of nodes. The primary node loses this status and
 steps down to become a secondary node. A new primary can't be elected
 until a majority of the cluster's nodes become available.
 
-For mission-critical applications with high uptime needs, consider 
-:ref:`adding a temporary arbiter <add-member-to-rs>` to a 
-three-member or five-member replica set before you perform maintenance.
-The temporary arbiter can maintain cluster majority in case 
-an additional cluster node becomes unavailable during a maintenance 
-period.
-
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