Revert "Add vkCmd* device extension functions"

Revert submission 2064289-vkcmd

Reason for revert: Breaks Chromium-Fuchsia integration: crbug.com/1318543

Reverted Changes:
I838311ac2:Add vkCmd* device extension functions
Idb329b86e:Add functions to fetch device from commandbuffer
I43030bb15:Add vkCmd* device extension functions

Change-Id: Ie750ae2a4c2db058023efdb468bbfd51cf503aa3
1 file changed