clean up sln file

Author: rose-a

FluentAssertions.Reactive.sln

@@ -19,8 +19,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		.editorconfig = .editorconfig
 	EndProjectSection
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "_build", "build\_build.csproj", "{88BFDCE4-4A60-462B-8287-9B4627EC2040}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -55,16 +53,6 @@ Global
 		{F7FA72E3-365F-4F5C-8B5B-377DDE9B8B2F}.Release|x64.Build.0 = Release|Any CPU
 		{F7FA72E3-365F-4F5C-8B5B-377DDE9B8B2F}.Release|x86.ActiveCfg = Release|Any CPU
 		{F7FA72E3-365F-4F5C-8B5B-377DDE9B8B2F}.Release|x86.Build.0 = Release|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Debug|x64.ActiveCfg = Debug|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Debug|x64.Build.0 = Debug|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Debug|x86.Build.0 = Debug|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Release|x64.ActiveCfg = Release|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Release|x64.Build.0 = Release|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Release|x86.ActiveCfg = Release|Any CPU
-		{88BFDCE4-4A60-462B-8287-9B4627EC2040}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE