Remove dependency on deprecated Slicer core modules

[lassoan]

We are planning to remove Slicer core modules that have been superseded by other modules.
https://discourse.slicer.org/t/removing-legacy-modules-in-slicer5/11371

We have noticed that this extension currently uses legacy editor module, and charts infrastructure (instead of Segment editor, Plots, and Tables modules).

If you want your extension to be available for the upcoming Slicer5 release, please remove dependency to deprecated modules. If you have any questions or need any help with the upgrade, you can write here or post to the Slicer forum. Thank you for your contribution.