layers: remove unicode header from vk-layer-generate.py
layers: remove unicode header from vk-layer-generate.py

A unicode header snuck into the front of vk-layer-generate.py.
It does not belong there.

Change-Id: Iad04156d0ed9a0e0c880f88a259b7f5f76406b1d

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools