Don't need Nullable after all

Author: nblumhardt

src/Serilog.Formatting.Compact.Reader/Serilog.Formatting.Compact.Reader.csproj

@@ -24,7 +24,6 @@
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Serilog" Version="3.1.0-*" />
-    <PackageReference Include="Nullable" Version="1.3.1" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>