DOC-2525 removed xunit config

Author: andy-stark-redis

tests/Doc/Doc.csproj

@@ -22,7 +22,4 @@
     <ProjectReference Include="..\..\src\NRedisStack\NRedisStack.csproj" />
     <ProjectReference Include="..\..\tests\NRedisStack.Tests\NRedisStack.Tests.csproj" />
   </ItemGroup>
-  <ItemGroup>
-    <Content Include="xunit.runner.json" CopyToOutputDirectory="PreserveNewest" />
-  </ItemGroup>
 </Project>