You can hide default entries in the navigation tree if you have not installed the products that populate them with data.
Prerequisites
The default M&R platform displays nodes such as Operations, Explore, Dashboards, and Planning in the navigation tree. Other product suites that also use M&R as their platform display entries under these nodes by default. However, no data populates these entries unless you are using those products. The SolutionPack for Smarts populates data in the Network block under Operations, Explore, and Dashboards.