remove readme badges

Author: DannyBen

README.md

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 # GTX - Minimal Template Engine
 
-[![Gem Version](https://badge.fury.io/rb/gtx.svg)](https://badge.fury.io/rb/gtx)
-[![Build Status](https://github.com/DannyBen/gtx/workflows/Test/badge.svg)](https://github.com/DannyBen/gtx/actions?query=workflow%3ATest)
-[![Maintainability](https://api.codeclimate.com/v1/badges/8c7e16a17866cc0e6a17/maintainability)](https://codeclimate.com/github/DannyBen/gtx/maintainability)
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 GTX is a minimal template engine that transpiles to ERB before using it to 
 generate the output.