I dig more into this and observed it is merely hard to completely disable this banner messaging in Windchill 10.1. However I am able to do just flash it as soon as object is created and quickly fade away.
If that is okay for you, below are the steps:
1. Open messaging.jsfrag file located at <WT_HOME>\codebase\netmarkets\javascript\util\jsfrags\messaging directory using notepad editor
2. Change Value of PTC.messaging.deferTimeoutMill to 1 (PTC.messaging.deferTimeoutMill = 1) at line 12
3. Change below line as: (line 17)
PTC.messaging.deferTimeoutMill = parseFloat(pref) * 1000 ;
to
PTC.messaging.deferTimeoutMill = parseFloat(pref) * 0000 ;
4. Save above changes.
5. Execute below command from Windchill Shell:
ant -f bin\jsfrag_combine
6. Make sure BUILD SUCCESSFUL
7. Stop Windchill Method Server
8. Clear Tomcat, Info*Engine cache
9. Restart Windchill Method Server
10. Also clear Browser cache and open new browser session
12. Try creating new object
13. You will observe Confirmation banner just flashes and disappears.
Clik here to view.
