How do I delete a modified message and revert back to the default value?
Go to Message Bundle Manager.

Select the Message Bundle Manager tool from the Tool Menu in the Administration Workspace.
Note: If you do not see the Message Bundle Manager tool in the menu, you may need to add it. See How do I add a stealthed tool to a site? for more information on adding a tool to the site.
Click Modified Messages.
All modified messages in the system will display.
Tip: If there are a large number of messages, remember that you can enter text into the Filter Results field to narrow down the results and help locate a specific message.
Click Edit.

The modified message will be deleted.
