Revert change.

Author: philliphoff

src/Shared/Shared.csproj

@@ -14,8 +14,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="/Users/phoff/Source/Azure/durabletask/src/DurableTask.Core/DurableTask.Core.csproj" />
-    <!-- <PackageReference Include="Microsoft.Azure.DurableTask.Core" /> -->
+    <PackageReference Include="Microsoft.Azure.DurableTask.Core" />
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" />
     <PackageReference Include="Microsoft.Extensions.Hosting" />
   </ItemGroup>