Vulkan: Cleanup some TODOs in TextureTest.cpp
Vulkan: Cleanup some TODOs in TextureTest.cpp

Bug: angleproject:2364

Change-Id: I316db1f6796a4a2efe344dd4b0a4a6e7bf2ead90
Reviewed-on: https://chromium-review.googlesource.com/1005556
Commit-Queue: Luc Ferron <a2389c1bcb3ee32b089866e04e35d1a302020674@chromium.org>
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle