Removed Travis Badge

Author: lucaderi

README.md

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 ![pfring][pfring_logo]
 # PF_RING™
 
-[![Build Status](https://travis-ci.org/ntop/PF_RING.png?branch=dev)](https://travis-ci.org/ntop/PF_RING)
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 ### Introduction
 
 PF_RING™ is a Linux kernel module and user-space framework that allows you to process packets at high-rates while providing you a consistent API for packet processing applications.