Revert "added database check for null id in updateCustomer dao"

This reverts commit 9e9fae71f149144d7e7d4f849979945808006645.
Merge branch 'master' of https://github.com/Myhall/PA165_DeliveryService.git
customer
Merge branch 'master' of https://github.com/Myhall/PA165_DeliveryService.git