How to Delete Autofill Entries in Your Browser’s Address Bar
Start typing in a website’s address. When your browser begins to auto-populate the wrong address in Chrome’s address bar, hold down Shift and Function on a Mac—and tap the Delete key. Once you see a website highlighted, you can also tap the up and down arrows on your keyboard to pull up any proposed result to delete it. It’s as easy as that—and a lot more convenient than clearing your entire history.
Source: How to Delete Autofill Entries in Your Browser’s Address Bar