Remove yolov4 to decrease bundle size

Author: nums11

Samples/WinMLSamplesGallery/WinMLSamplesGallery/WinMLSamplesGallery.csproj

@@ -50,7 +50,6 @@
 
   <!-- Models to include in the app -->
   <ItemGroup>
-    <Content Include="Models\yolov4.onnx" />
     <Content Include="Models\densenet-9.onnx" />
     <Content Include="Models\efficientnet-lite4-11.onnx" />
     <Content Include="Models\shufflenet-9.onnx" />
@@ -171,9 +170,6 @@
     <DownloadFile Condition="!Exists('$(MSBuildProjectDirectory)\Models\squeezenet1.1-7.onnx')" SourceUrl="https://github.com/onnx/models/raw/master/vision/classification/squeezenet/model/squeezenet1.1-7.onnx" DestinationFolder="$(MSBuildProjectDirectory)\Models">
       <Output TaskParameter="DownloadedFile" ItemName="Content" />
     </DownloadFile>
-    <DownloadFile Condition="!Exists('$(MSBuildProjectDirectory)\Models\yolov4.onnx')" SourceUrl="https://github.com/onnx/models/raw/master/vision/object_detection_segmentation/yolov4/model/yolov4.onnx" DestinationFolder="$(MSBuildProjectDirectory)\Models">
-      <Output TaskParameter="DownloadedFile" ItemName="Content" />
-    </DownloadFile>
 
     <!-- Large models. This models must be enabled for Build-From-Source scenarios -->
     <DownloadFile Condition="$(UseLargeModels) AND !Exists('$(MSBuildProjectDirectory)\LargeModels\bvlcalexnet-9.onnx')" SourceUrl="https://github.com/onnx/models/raw/master/vision/classification/alexnet/model/bvlcalexnet-9.onnx" DestinationFolder="$(MSBuildProjectDirectory)\LargeModels">