Remove unused sub-module;

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "SlackBotNet"]
-	path = SlackBotNet
-	url = https://github.com/jweber/SlackBotNet

DotNetCoreBuildServer.sln

@@ -7,8 +7,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Server", "Server\Server.csp
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ConsoleClient", "ConsoleClient\ConsoleClient.csproj", "{08C14B35-FF95-4CFA-A5D2-6E25F54DBA9A}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SlackBotNet", "SlackBotNet\src\SlackBotNet\SlackBotNet.csproj", "{A95F63B9-E39D-4D70-995C-8E8632BE8A62}"
-EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{55971ABC-32EA-47D4-BA98-DE3C58284891}"
 	ProjectSection(SolutionItems) = preProject
 		README.md = README.md
@@ -28,10 +26,6 @@ Global
 		{08C14B35-FF95-4CFA-A5D2-6E25F54DBA9A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{08C14B35-FF95-4CFA-A5D2-6E25F54DBA9A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{08C14B35-FF95-4CFA-A5D2-6E25F54DBA9A}.Release|Any CPU.Build.0 = Release|Any CPU
-		{A95F63B9-E39D-4D70-995C-8E8632BE8A62}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{A95F63B9-E39D-4D70-995C-8E8632BE8A62}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{A95F63B9-E39D-4D70-995C-8E8632BE8A62}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{A95F63B9-E39D-4D70-995C-8E8632BE8A62}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE