fix(readme): remove the travis-ci badge

Author: codebymikey

README.md

@@ -5,7 +5,6 @@ their (environment) extension prefix, similar to React Native's
 [platform-specific extensions][react-platform-specific-extensions] behaviour.
 
 [![npm](https://img.shields.io/npm/v/node-sass-conditional-importer.svg)](https://www.npmjs.com/package/node-sass-conditional-importer)
-[![build status](https://travis-ci.org/codebymikey/node-sass-conditional-importer.svg?branch=master)](https://travis-ci.org/codebymikey/node-sass-conditional-importer)
 [![Codecov Coverage](https://img.shields.io/codecov/c/github/codebymikey/node-sass-conditional-importer/coverage.svg?style=flat-square)](https://codecov.io/gh/codebymikey/node-sass-conditional-importer/)
 [![Release](https://github.com/codebymikey/node-sass-conditional-importer/workflows/Release/badge.svg)](https://github.com/codebymikey/node-sass-conditional-importer/actions?query=workflow%3ARelease)