As demonstrated in the following video, in Pharo 13 build 313, removing a breakpoint doesn’t seem to remove it (the editor is not updated to reflect the removal, reselecting the method shows that the breakpoint did get removed).
I checked earlier builds, it works in build 240 but not in build 241, so I assume that’s due to the changes in commit 9592b12ec3146d31 which merged pull request #16782.
As demonstrated in the following video, in Pharo 13 build 313, removing a breakpoint doesn’t seem to remove it (the editor is not updated to reflect the removal, reselecting the method shows that the breakpoint did get removed).
https://github.com/user-attachments/assets/317246ed-266f-4280-806d-a037ed8009d5