Adapter not sending "removed" loadedSource events on page refresh.

[EricCornelson]

The adapter should be sending the "removed" loadedSource events when the page is refreshed to clear out old scripts, but it does not. This results in duplicated scripts in the scripts view while debugging (in Visual Studio only).

• VS Code Version: N/A
• Log file (set "trace": true in launch config):

Steps to reproduce:

1. Launch Edge with debugging
2. See in the logs that the loadedSource events with "removed" are never sent after a page refresh.