fix(readme): Clean up README badges

Author: pvdlg

README.md

@@ -2,16 +2,9 @@
 
 Customizable commit-analyzer plugin for [semantic-release](https://github.com/semantic-release/semantic-release) based on [conventional-changelog](https://github.com/conventional-changelog/conventional-changelog)
 
-[![npm](https://img.shields.io/npm/v/@semantic-release/commit-analyzer.svg)](https://www.npmjs.com/package/@semantic-release/commit-analyzer)
-[![npm](https://img.shields.io/npm/dt/@semantic-release/commit-analyzer.svg)](https://www.npmjs.com/package/@semantic-release/commit-analyzer)
-[![Greenkeeper badge](https://badges.greenkeeper.io/semantic-release/commit-analyzer.svg)](https://greenkeeper.io/)
-[![license](https://img.shields.io/github/license/semantic-release/commit-analyzer.svg)](https://github.com/semantic-release/commit-analyzer/blob/master/LICENSE)
-[![styled with prettier](https://img.shields.io/badge/styled_with-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
-[![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
-[![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
-
 [![Travis](https://img.shields.io/travis/semantic-release/commit-analyzer.svg)](https://travis-ci.org/semantic-release/commit-analyzer)
 [![Codecov](https://img.shields.io/codecov/c/github/semantic-release/commit-analyzer.svg)](https://codecov.io/gh/semantic-release/commit-analyzer)
+[![Greenkeeper badge](https://badges.greenkeeper.io/semantic-release/commit-analyzer.svg)](https://greenkeeper.io/)
 
 ## Options