Remove redundant line in README file

Author: dubiety

README.md

@@ -1,6 +1,5 @@
 # terraform-aws-elasticsearch-cloudwatch-sns-alarms
 
-https://app.travis-ci.com/dubiety/terraform-aws-elasticsearch-cloudwatch-sns-alarms.svg?branch=master
 [![Build Status](https://travis-ci.com/dubiety/terraform-aws-elasticsearch-cloudwatch-sns-alarms.svg?branch=master)](https://app.travis-ci.com/github/dubiety/terraform-aws-elasticsearch-cloudwatch-sns-alarms)
 [![Latest Release](https://img.shields.io/github/release/dubiety/terraform-aws-elasticsearch-cloudwatch-sns-alarms.svg)](https://github.com/dubiety/terraform-aws-elasticsearch-cloudwatch-sns-alarms/releases)