I searching for complete and clean un-installation of workbench to re-install. But i'm not able to find any document. I tried just uninstalling by removing the "cloudera-data-science-workbench-1.0.0-1.el7.centos.x86_64.rpm", but still i'm able to see old configuration files and dependencies.
It's intentional to not delete the configuration and user data with the 'yum remove' command. The product is using the 'yum remove' - 'yum install' sequence for upgrades as shown in the public doc:
What do you want to reset exactly? Why do you need to remove everything?