The modelling menu was split up into two menus in later versions of Maya.The polygons menu set contains all things to do with polygons and the Surfaces menu contains all the tools for Nurbs and Subdivisional surfaces.

The Polygon menu was renamed Mesh

The Edit Polygon menu was renamed Edit Mesh

You can't change the menus back to the older layout but all the old tools still exist in one of these menus and you can create a custom menue set if you want by selecting custom at the bottom of the menu list.