remove old NuGet.Core packages

Author: mythz

NuGet.Core/ServiceStack.Redis.Core/servicestack.redis.core.nuspec

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.27130.2003
+VisualStudioVersion = 15.0.27130.2010
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Build", "Build", "{38F69F8F-9303-4BAF-B081-D28339163E07}"
 	ProjectSection(SolutionItems) = preProject
@@ -10,7 +10,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Build", "Build", "{38F69F8F
 		..\build\build.tasks = ..\build\build.tasks
 		..\build\copy.bat = ..\build\copy.bat
 		..\README.md = ..\README.md
-		..\NuGet.Core\ServiceStack.Redis.Core\servicestack.redis.core.nuspec = ..\NuGet.Core\ServiceStack.Redis.Core\servicestack.redis.core.nuspec
 		..\NuGet\ServiceStack.Redis\servicestack.redis.nuspec = ..\NuGet\ServiceStack.Redis\servicestack.redis.nuspec
 	EndProjectSection
 EndProject