Removes a source identifier from an existing RDS event notification subscription.
rds_remove_source_identifier_from_subscription(SubscriptionName,
SourceIdentifier)
[required] The name of the RDS event notification subscription you want to remove a source identifier from.
[required] The source identifier to be removed from the subscription, such as the DB instance identifier for a DB instance or the name of a security group.
svc$remove_source_identifier_from_subscription( SubscriptionName = "string", SourceIdentifier = "string" )