Update billing-after-failover.md

Author: AbdullahMSFT

docs/sql-server/azure-arc/includes/billing-after-failover.md

@@ -9,7 +9,4 @@ ms.custom: ignite-2023
 
 ### ESU billing after failover
 
-During the failovers, the extension is aware of the transition and automatically switches the ESU billing to the active replica without new bill-back charges and follow below logic
-
-- If the period of failover <= 90 days, ESU billback occurs only from the prior watermark of usage upload.
-- If the period of failover > 90 days, ESU billback occurs from the start of the ESU period.
+During the failovers, the extension is aware of the transition and automatically switches the ESU billing to the active replica without new bill-back charges.