Remove targets file since all platforms can sign now

Author: bording

Diff for: Directory.Build.targets

@@ -1,6 +1,6 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.27009.1
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.28803.202
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LibGit2Sharp", "LibGit2Sharp\LibGit2Sharp.csproj", "{EE6ED99F-CB12-4683-B055-D28FC7357A34}"
 EndProject
@@ -11,7 +11,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		.gitignore = .gitignore
 		Targets\CodeGenerator.targets = Targets\CodeGenerator.targets
 		Directory.Build.props = Directory.Build.props
-		Directory.Build.targets = Directory.Build.targets
 		Targets\GenerateNativeDllName.targets = Targets\GenerateNativeDllName.targets
 		nuget.config = nuget.config
 		version.json = version.json