Question: how to drop rcu schema?
Answer: Unzip the RCU zip file in a folder.
Run the rcu.bat from rcuHome\bin directory.
The RCU wizard appears on the screen, Click Next.
Enable Drop & click Next.
Enter the database details (SYSDBA) where FMW schemes has created.
Click Ok for the popup.
The FMW schemas that created previously using RCU will show on the drop down.