style(dead code): remove some dead code
style(dead code): remove some dead code

TitanUser/camunda-bpm-webapp,nagyistoce/camunda-tasklist-ui,kingtec/camunda-tasklist-ui,xlinur/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,nagyistoce/camunda-tasklist-ui,kingtec/camunda-tasklist-ui,TitanUser/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp