Update README.md (zalando#1217)

Removed all the badges, they don't work anyways and are off.

Author: Jan-M

README.md

@@ -1,11 +1,5 @@
 # Postgres Operator
 
-[![Build Status](https://travis-ci.org/zalando/postgres-operator.svg?branch=master)](https://travis-ci.org/zalando/postgres-operator)
-[![Coverage Status](https://coveralls.io/repos/github/zalando/postgres-operator/badge.svg)](https://coveralls.io/github/zalando/postgres-operator)
-[![Go Report Card](https://goreportcard.com/badge/github.com/zalando/postgres-operator)](https://goreportcard.com/report/github.com/zalando/postgres-operator)
-[![GoDoc](https://godoc.org/github.com/zalando/postgres-operator?status.svg)](https://godoc.org/github.com/zalando/postgres-operator)
-[![golangci](https://golangci.com/badges/github.com/zalando/postgres-operator.svg)](https://golangci.com/r/github.com/zalando/postgres-operator)
-
 <img src="docs/diagrams/logo.png" width="200">
 
 The Postgres Operator delivers an easy to run highly-available [PostgreSQL](https://www.postgresql.org/)