chore: remove travis ci badge

Signed-off-by: Kush Trivedi <[email protected]>

README.md

@@ -1,7 +1,6 @@
 # Kubernetes perf-tests
 
-[![Build Status](https://travis-ci.org/kubernetes/perf-tests.svg?branch=master)](https://travis-ci.org/kubernetes/perf-tests)  [![Go Report Card](https://goreportcard.com/badge/github.com/kubernetes/perf-tests)](https://goreportcard.com/report/github.com/kubernetes/perf-tests)
-
+[![Go Report Card](https://goreportcard.com/badge/github.com/kubernetes/perf-tests)](https://goreportcard.com/report/github.com/kubernetes/perf-tests)
 
 This repo is dedicated for storing various Kubernetes-related performance test related tools. If you want to add your own load-test, benchmark, framework or other tool please contact with one of the Owners.