Removes the member described by the hostname parameter from the current replica set. This function will disconnect the shell briefly and forces a reconnection as the replica set renegotiates which member will be primary. As a result, the shell will display an error even if this command succeeds.
The rs.remove() method has the following parameter:
Parameter Type Description hostname string The hostname of a system in the replica set.
Before running the rs.remove() operation, you must shut down the replica set member that you’re removing.
Changed in version 2.2: This procedure is no longer required when using rs.remove(), but it remains good practice.