Remove old references

Author: Andrii Siriak

C-Sharp.sln

@@ -9,14 +9,12 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Docs", "Docs", "{DAB16DEC-A
 		CONTRIBUTING.md = CONTRIBUTING.md
 		LICENSE = LICENSE
 		README.md = README.md
-		DIRECTORY.md = DIRECTORY.md
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Configs", "Configs", "{F3AC2246-318B-4EE4-BD9E-D751D3044901}"
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
 		.gitignore = .gitignore
-		.travis.yml = .travis.yml
 		stylecop.json = stylecop.json
 		stylecop.ruleset = stylecop.ruleset
 	EndProjectSection