Remove nonsense vertexData.empty() calls

Author: gongminmin

Samples/Desktop/D3D12VariableRateShading/src/VariableRateShadingScene.h

@@ -62,7 +62,6 @@ namespace SampleAssets
             const float width = 266.66f * scale;
             const float height = 150.0f * scale;
 
-            vertexData.empty();
             vertexData.resize(4);
 
             vertexData[0].position = { x, y, z };

Samples/UWP/D3D12VariableRateShading/src/VariableRateShadingScene.h

@@ -62,7 +62,6 @@ namespace SampleAssets
             const float width = 266.66f * scale;
             const float height = 150.0f * scale;
 
-            vertexData.empty();
             vertexData.resize(4);
 
             vertexData[0].position = { x, y, z };