You can't delete an individual URL from the Address bar's AutoComplete list, but you can delete the entire AutoComplete URL list from the Address bar's collection. To do so:

• In the Internet Explorer Menu, go to: Tools | Internet Options | General tab.
• Click the Clear History in the History area.
• Click Yes when prompted to confirm the action.
• Click OK when you've finished.

In addition to deleting the URLs saved in your Address bar, this technique also deletes all the sites that have been saved in your History list.