Please post your project.
What you see is not a warning, just a notice. The DAC thats used by the CapSense component has a range of 0-4.08V (which is hardwired). So with a Vdda of 3.3V you get the notice that you cannot use the full range. Since you don't need it, its not relevant for you.
The actual warning that you get is that the variable 'whoami' is not used in your code (so its probably never read).