maint: drop obsolete badges from README.md

Author: claudioandre-br

README.md

@@ -1,8 +1,6 @@
-[![Build Status](https://api.travis-ci.com/openwall/john.svg?branch=bleeding-jumbo)](https://travis-ci.com/github/openwall/john)
 [![Circle CI](https://circleci.com/gh/openwall/john/tree/bleeding-jumbo.svg?style=shield)](https://circleci.com/gh/openwall/john/tree/bleeding-jumbo)
 [![Downloads](https://img.shields.io/badge/Download-Windows%20Build-blue.svg)](https://github.com/openwall/john-packages/releases/tag/jumbo-dev)
 [![License](https://img.shields.io/badge/License-GPL%20v2%2B-blue.svg)](https://github.com/openwall/john/blob/bleeding-jumbo/doc/LICENSE)
-[![LoC](https://tokei.rs/b1/github/openwall/john?category=code)](https://github.com/openwall/john/tree/bleeding-jumbo)
 [![Search hit](https://img.shields.io/github/search/openwall/john/goto.svg?label=GitHub%20Hits)](https://github.com/search?utf8=%E2%9C%93&q=john%20the%20ripper&type=)
 
 John the Ripper