The Visual Studio 2017 solution will be deprecated in favor of using
Visual Studio 2019 for building the CMake project.

For now we're keeping it for just the legacy OpenGL ES and Direct3D
builds, but Vulkan related projects are removed since they break the
full solution build frequently and fixing them may be more involved than
running build/cmake.sh again.

Bug: swiftshader:134
Bug: b/139189696
Change-Id: I5225a291c6cf4bb8c5d0b9a2f7a16f2e85823feb
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/35708
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>