The breakpoint can't be removed when multi-project opened

[huanzai]

1. First, open a sublime project and open the debugger
2. Then open the second sublime project and keep the debugger closed.
3. Set a breakpoint in the second sublime project's view.
4. Open the debugger in second sublime project.
5. The breakpoint can't be removed in second project.

After analysis the code, I found the issue https://github.com/daveleroy/SublimeDebugger/blob/6f4c900cf5c27f93d1289abc6731e34030ece78e/start.py#L111

Remove this line, the issue can be resolved.

Should we remove this line ? Or could you explain your original intention ？