All vulkan resource access will be through descriptors. We don't need
any of this context-side state.

Bug: b/125909515
Change-Id: Id6d1da0f8a851e057dd3a16fc844b6a70cf9b935
Reviewed-on: https://swiftshader-review.googlesource.com/c/25330
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Chris Forbes <chrisforbes@google.com>