Removed Travis CI support

README.md

@@ -2,7 +2,6 @@ cpp-peglib
 ==========
 
 [![](https://github.com/yhirose/cpp-peglib/workflows/CMake/badge.svg)](https://github.com/yhirose/cpp-peglib/actions)
-[![Build Status](https://travis-ci.org/yhirose/cpp-peglib.svg?branch=master)](https://travis-ci.org/yhirose/cpp-peglib)
 [![Bulid Status](https://ci.appveyor.com/api/projects/status/github/yhirose/cpp-peglib?branch=master&svg=true)](https://ci.appveyor.com/project/yhirose/cpp-peglib)
 
 C++17 header-only [PEG](http://en.wikipedia.org/wiki/Parsing_expression_grammar) (Parsing Expression Grammars) library. You can start using it right away just by including `peglib.h` in your project.