Remove unnecessary package dependencies

packages.cake

@@ -198,7 +198,6 @@ public class Packages
                     new NuSpecDependency() { Id = "System.Threading.ThreadPool", TargetFramework = "netcoreapp1.0", Version = "4.3.0" },
                     new NuSpecDependency() { Id = "Microsoft.Extensions.DependencyModel", TargetFramework = "netcoreapp1.0", Version = "1.1.0" },
                     new NuSpecDependency() { Id = "NETStandard.Library", TargetFramework = "netcoreapp1.0", Version = "1.6.0" },
-                    new NuSpecDependency() { Id = "Microsoft.NETCore.Portable.Compatibility", TargetFramework = "netcoreapp1.0", Version = "1.0.1" },
                     new NuSpecDependency() { Id = "Splat", TargetFramework = "netcoreapp1.0", Version = SplatVersion },
                     new NuSpecDependency() { Id = "Serilog", TargetFramework = "netcoreapp1.0", Version = SerilogVersion },
                     new NuSpecDependency() { Id = "Sprache", TargetFramework = "netcoreapp1.0", Version = SpracheVersion },
@@ -429,8 +428,7 @@ public class Packages
                     //netstandard1.3
                     new NuSpecDependency() { Id = "Avalonia", TargetFramework = "netstandard1.3", Version = parameters.Version },
                     new NuSpecDependency() { Id = "SkiaSharp", TargetFramework = "netstandard1.3", Version = SkiaSharpVersion },
-                    new NuSpecDependency() { Id = "NETStandard.Library", TargetFramework = "netstandard1.3", Version = "1.6.0" },
-                    new NuSpecDependency() { Id = "Microsoft.NETCore.Portable.Compatibility", TargetFramework = "netstandard1.3", Version = "1.0.1" }
+                    new NuSpecDependency() { Id = "NETStandard.Library", TargetFramework = "netstandard1.3", Version = "1.6.0" }
                 },
                 Files = new []
                 {
@@ -473,9 +471,7 @@ public class Packages
                     new NuSpecDependency() { Id = "Avalonia.Skia.Desktop", Version = parameters.Version },
                     //netstandard1.3
                     new NuSpecDependency() { Id = "Avalonia", TargetFramework = "netstandard1.3", Version = parameters.Version },
-                    new NuSpecDependency() { Id = "Avalonia.Skia.Desktop", TargetFramework = "netstandard1.3", Version = parameters.Version },
-                    new NuSpecDependency() { Id = "NETStandard.Library", TargetFramework = "netstandard1.3", Version = "1.6.0" },
-                    new NuSpecDependency() { Id = "Microsoft.NETCore.Portable.Compatibility", TargetFramework = "netstandard1.3", Version = "1.0.1" }
+                    new NuSpecDependency() { Id = "Avalonia.Skia.Desktop", TargetFramework = "netstandard1.3", Version = parameters.Version }
                 },
                 Files = new []
                 {