remove stale PackageReference and Class

Author: dougmoney

sample/Sample/Sample.csproj

@@ -17,7 +17,6 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="1.1.1" />
     <PackageReference Include="Serilog.Sinks.Async" Version="1.0.1" />
     <PackageReference Include="Serilog.Sinks.Console" Version="3.1.1" />
-    <PackageReference Include="Serilog.Sinks.Literate" Version="2.0.0" />
     <PackageReference Include="Serilog.Sinks.RollingFile" Version="3.0.0" />
     <PackageReference Include="Serilog.Enrichers.Environment" Version="2.0.0" />
     <PackageReference Include="Serilog.Enrichers.Thread" Version="2.0.0" />