Update README.md

Author: vishr

README.md

@@ -1,7 +1,4 @@
 <a href="https://echo.labstack.com"><img height="80" src="https://cdn.labstack.com/images/echo-logo.svg"></a>
-<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-2-orange.svg?style=flat-square)](#contributors-)
-<!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 [![Sourcegraph](https://sourcegraph.com/github.com/labstack/echo/-/badge.svg?style=flat-square)](https://sourcegraph.com/github.com/labstack/echo?badge)
 [![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://pkg.go.dev/github.com/labstack/echo/v4)