Remove Jenkins build-badge from README.md
Remove Jenkins build-badge from README.md

lucasallan/rkt,coreos/rkt,joshix/rkt,joshix/rkt,kinvolk/rkt,coreos/rkt,kinvolk/rkt,rkt/rkt,lucasallan/rkt,joshix/rkt,alban/rkt,alban/rkt,joshix/rkt,kinvolk/rkt,rkt/rkt,kinvolk/rkt,coreos/rkt,lucasallan/rkt,rkt/rkt,rkt/rkt,lucasallan/rkt,alban/rkt