In Microsoft SQL Server, the jobs are owned by MSDB database (job scheduler) and the user database, vCenter Server Database (VCDB), is independent of the MSDB. If you drop the database exclusively using either t-sql (drop database) command or through SQL Management Studio (GUI), the jobs related to the VCDB are orphaned and will need to be dropped or deleted manually.
To locate the orphaned jobs use either one of the following methods:
To manually delete the orphaned jobs, refer to the following articles