Fixed PackageReference for neo (#897)

Author: cschuchardt88

src/Neo.Compiler.CSharp/Neo.Compiler.CSharp.csproj

@@ -19,7 +19,6 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
     <PackageReference Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
-    <PackageReference Include="Neo" Version="3.6.2" />
     <PackageReference Include="System.CommandLine.NamingConventionBinder" Version="2.0.0-beta4.22272.1" />
   </ItemGroup>