Uninstall Youreka to remove the package and all of its components from your Salesforce environment.
In order to uninstall Youreka, visit Setup->Installed Packages to view all of the packages in the environment. Click Uninstall next to the Youreka package.
The following screen shows you all of the components that will be removed from the Salesforce environment.
Scroll down the bottom of the screen, and click Yes, I want to uninstall this package and permanently delete all associated components.