How remove graphical interface

In order to accomplish this we go in Server Manager and we open Add roles and Features Wizard we select or deselect under User Interfaces  and Infrastructure first the Graphical Management Tools and Infrastructure and second Server Graphical Shell as shown  in figure 1.

 Figure 1: User Interface and Infrastructure

We can also remove the graphical user interface feature in power shell (figure 2)

Figure 2: Removing graphical interface in powershell