CI: Remove Travis CI builds

Author: ccawley2011

.travis.yml

@@ -1,4 +1,4 @@
-# [ScummVM README](https://www.scummvm.org/) · [![Build Status](https://travis-ci.org/scummvm/scummvm.svg?branch=master)](https://travis-ci.org/scummvm/scummvm) ![CI](https://github.com/scummvm/scummvm/workflows/CI/badge.svg) [![Translation status](https://translations.scummvm.org/widgets/scummvm/-/scummvm/svg-badge.svg)](https://translations.scummvm.org/engage/scummvm/?utm_source=widget) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](CONTRIBUTING.md#pull-requests) [![Codacy Badge](https://app.codacy.com/project/badge/Grade/e06e5b18f8464fef859b5a7f78d10357)](https://www.codacy.com/gh/scummvm/scummvm/dashboard?utm_source=github.com&utm_medium=referral&utm_content=scummvm/scummvm&utm_campaign=Badge_Grade)
+# [ScummVM README](https://www.scummvm.org/) · ![CI](https://github.com/scummvm/scummvm/workflows/CI/badge.svg) [![Translation status](https://translations.scummvm.org/widgets/scummvm/-/scummvm/svg-badge.svg)](https://translations.scummvm.org/engage/scummvm/?utm_source=widget) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](CONTRIBUTING.md#pull-requests) [![Codacy Badge](https://app.codacy.com/project/badge/Grade/e06e5b18f8464fef859b5a7f78d10357)](https://www.codacy.com/gh/scummvm/scummvm/dashboard?utm_source=github.com&utm_medium=referral&utm_content=scummvm/scummvm&utm_campaign=Badge_Grade)
 
 ## About ScummVM