docs: remove travis build status

Author: Audio

Readme.md

@@ -5,7 +5,6 @@
 [![npm](https://img.shields.io/npm/dt/etherscan-api.svg)](https://www.npmjs.com/package/etherscan-api)
 [![license](https://img.shields.io/github/license/sebs/etherscan-api.svg)](https://github.com/sebs/etherscan-api/blob/master/LICENSE.md)
 [![GitHub tag](https://img.shields.io/github/tag/sebs/etherscan-api.svg)](https://github.com/sebs/etherscan-api)
-[![Travis](https://img.shields.io/travis/sebs/etherscan-api.svg)](https://travis-ci.org/sebs/etherscan-api)
 [![GitHub issues](https://img.shields.io/github/issues/sebs/etherscan-api.svg)](https://github.com/sebs/etherscan-api/issues)
 
 A way to access the [etherscan.io api](https://etherscan.io/apis) using promises. Fetch a diverse set of information about the blockchain.