feat(grid): remove viewportIndex and only rely on viewportId (#3591)

Co-authored-by: Bill Wallace <wayfarer3130@gmail.com>

extensions/cornerstone-dicom-seg/src/panels/PanelSegmentation.tsx

@@ -271,7 +271,6 @@ PanelSegmentation.propTypes = {
   commandsManager: PropTypes.shape({
     runCommand: PropTypes.func.isRequired,
   }),
-  appConfig: PropTypes.object.isRequired,
   servicesManager: PropTypes.shape({
     services: PropTypes.shape({
       segmentationService: PropTypes.shape({