message: Remove a couple of outdated TODO items
diff: #include "vk_core.h"
  #include "vk_debug.h"
  -// VKTODOLOW for depth-stencil images we are only save/restoring the depth, not the stencil
  -
  // VKTODOLOW there's a lot of duplicated code in this file for creating a buffer to do
  // a memory copy and saving to disk.
  -// VKTODOLOW SerialiseComplexArray not having the ability to serialise into an in-memory
  -// array means some redundant copies.
  -// VKTODOLOW The code pattern for creating a few contiguous arrays all in one
  -// AllocAlignedBuffer for the initial contents buffer is ugly.
  // VKTODOLOW in general we do a lot of "create buffer, use it, flush/sync then destroy".
  // I don't know what the exact cost is, but it would be nice to batch up the buffers/etc
  