Remove YUV formats from rawgather test (#4479)

R8G8_B8G8_UNORM and G8R8_G8B8_UNORM are YUV formats really in spite of
not explicitly indicating by their names. We are leaving such out of
format casting for now

Author: Greg Roth

tools/clang/unittests/HLSL/ExecutionTest.cpp

@@ -4844,8 +4844,6 @@ TEST_F(ExecutionTest, ATORawGather) {
   RawIntTexture<IntRG<16, 16>, NumThreadsX, NumThreadsY> R16G16_SNORM(true, true, NumThreadsX, DXGI_FORMAT_R16G16_SNORM);
   RawIntTexture<IntRG<16, 16>, NumThreadsX, NumThreadsY> R16G16_SINT(true, false, NumThreadsX, DXGI_FORMAT_R16G16_SINT);
 
-  RawIntTexture<IntRGBA<8, 8, 8, 8>, NumThreadsX, NumThreadsY> R8G8_B8G8_UNORM(false, true, NumThreadsX, DXGI_FORMAT_R8G8_B8G8_UNORM);
-  RawIntTexture<IntRGBA<8, 8, 8, 8>, NumThreadsX, NumThreadsY> G8R8_G8B8_UNORM(false, true, NumThreadsX, DXGI_FORMAT_G8R8_G8B8_UNORM);
   RawIntTexture<IntRGBA<8, 8, 8, 8>, NumThreadsX, NumThreadsY> B8G8R8A8_TYPELESS(false, false, NumThreadsX, DXGI_FORMAT_B8G8R8A8_TYPELESS);
   RawIntTexture<IntRGBA<8, 8, 8, 8>, NumThreadsX, NumThreadsY> B8G8R8A8_UNORM(false, true, NumThreadsX, DXGI_FORMAT_B8G8R8A8_UNORM);
   RawIntTexture<IntRGBA<8, 8, 8, 8>, NumThreadsX, NumThreadsY> B8G8R8A8_UNORM_SRGB(false, true, NumThreadsX, DXGI_FORMAT_B8G8R8A8_UNORM_SRGB);
@@ -4878,8 +4876,6 @@ TEST_F(ExecutionTest, ATORawGather) {
                                 &R16G16_UINT,
                                 &R16G16_SNORM,
                                 &R16G16_SINT,
-                                &R8G8_B8G8_UNORM,
-                                &G8R8_G8B8_UNORM,
                                 &B8G8R8A8_TYPELESS,
                                 &B8G8R8A8_UNORM,
                                 &B8G8R8A8_UNORM_SRGB,