diff --git a/build/vc2013-bkl/vc2013/nana.sln b/build/vc2013-bkl/vc2013/nana.sln
deleted file mode 100644
index 8f49cc71..00000000
--- a/build/vc2013-bkl/vc2013/nana.sln
+++ /dev/null
@@ -1,22 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2013
-VisualStudioVersion = 12.0.21005.1
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "nana", "nana.vcxproj", "{78487472-4F43-5A69-93CC-4FDC4D124241}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Win32 = Debug|Win32
-		Release|Win32 = Release|Win32
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{78487472-4F43-5A69-93CC-4FDC4D124241}.Debug|Win32.ActiveCfg = Debug|Win32
-		{78487472-4F43-5A69-93CC-4FDC4D124241}.Debug|Win32.Build.0 = Debug|Win32
-		{78487472-4F43-5A69-93CC-4FDC4D124241}.Release|Win32.ActiveCfg = Release|Win32
-		{78487472-4F43-5A69-93CC-4FDC4D124241}.Release|Win32.Build.0 = Release|Win32
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal