Removing unnecessary dependencies

Jint/Jint.csproj

@@ -8,20 +8,16 @@
   </PropertyGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net40' OR '$(TargetFramework)' == 'net45' OR '$(TargetFramework)' == 'net451' ">
+    <Reference Include="System" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
     <Reference Include="System.Xml.Linq" />
-    <Reference Include="System" />
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
-    <PackageReference Include="System.Collections.Concurrent" Version="4.3.0" />
-    <PackageReference Include="System.Collections.NonGeneric" Version="4.3.0" />
     <PackageReference Include="System.Diagnostics.Contracts" Version="4.3.0" />
     <PackageReference Include="System.Dynamic.Runtime" Version="4.3.0" />
     <PackageReference Include="System.Reflection.TypeExtensions" Version="4.4.0" />
-    <PackageReference Include="System.Runtime.InteropServices" Version="4.3.0" />
-    <PackageReference Include="System.Xml.XmlDocument" Version="4.3.0" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
   </ItemGroup>