Remove unused System.Security.Cryptography.ProtectedData package version (#314)

Author: jeffkl

Packages.props

@@ -10,7 +10,6 @@
     <PackageReference Update="Microsoft.Win32.Registry" Version="4.7.0" />
     <PackageReference Update="MSBuild.ProjectCreation" Version="7.0.4-preview" />
     <PackageReference Update="Shouldly" Version="4.0.3" />
-    <PackageReference Update="System.Security.Cryptography.ProtectedData" Version="4.7.0" />
     <PackageReference Update="xunit" Version="2.4.1" />
     <PackageReference Update="xunit.runner.visualstudio" Version="2.4.3" />
   </ItemGroup>