Vmos are now non-resizable by default, so the non-resizable flag is no
longer necessary and will be removed.

Change-Id: I6752d414e59d651dbd4d95f815d6ecbac3e6eb6b
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/32708Reviewed-by: Wez <wez@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: David Stevens <stevensd@google.com>