Remove Unused Dependency Microsoft.Activities.Extensions

Author: kellenlask

VirtualizingCollection/VirtualizingCollection.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net451;netstandard2.0;</TargetFrameworks>
@@ -13,7 +13,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Activities.Extensions" Version="2.0.6.9" />
     <PackageReference Include="WindowsBase" Version="4.6.1055" />
   </ItemGroup>