Remove dependence on NLog from core

Author: ethanhann

src/InEngine.Core/InEngine.Core.csproj

@@ -19,7 +19,6 @@
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
     <PackageReference Include="CommandLineParser" Version="1.9.71" />
-    <PackageReference Include="NLog" Version="4.4.12" />
     <PackageReference Include="Quartz" Version="2.6.1" />
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="2.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="2.0.0" />