I work in ArcMap 10.4. I need to find a way to remove/hide some of the items displayed in the TOC after applying Pie chart symbology to features. The main idea is the items are somewhat duplicated but nonetheless needed for the correct display of data. Later the layers will be published for browsing in a map app on Portal for ArcGIS environment. There I need only one set of items to be displayed (as seen in the picture). Just to clarify - this has nothing to do with legends.
Is there a way to do it?
So basically I need to hide or remove items labelled as '_2'