scripts: Remove unused vk_helper.py struct_wrappers
scripts: Remove unused vk_helper.py struct_wrappers

Change-Id: I9dcc1df2d979f1c36a88bb2d6181636c543431a1

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