Remove badges from README

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Author: spawnia

README.md

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 # graphql-php
 
-[![Test](https://github.com/webonyx/graphql-php/workflows/Test/badge.svg)](https://github.com/webonyx/graphql-php/actions?query=workflow:Test+branch:master)
-[![Static Analysis](https://github.com/webonyx/graphql-php/workflows/Static%20Analysis/badge.svg)](https://github.com/webonyx/graphql-php/actions?query=workflow:%22Static%20Analysis%22+branch:master)
-[![Coverage Status](https://codecov.io/gh/webonyx/graphql-php/branch/master/graph/badge.svg)](https://codecov.io/gh/webonyx/graphql-php/branch/master)
-[![Latest Stable Version](https://poser.pugx.org/webonyx/graphql-php/version)](https://packagist.org/packages/webonyx/graphql-php)
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 This is a PHP implementation of the [GraphQL](https://graphql.org) [specification](https://github.com/graphql/graphql-spec)
 based on the [reference implementation in JavaScript](https://github.com/graphql/graphql-js).