Travis: Remove the duplicate addons directive (#3492)
Travis: Remove the duplicate addons directive (#3492)


square/okhttp,jrodbx/okhttp,tiarebalbi/okhttp,cketti/okhttp,cmzy/okhttp,ze-pequeno/okhttp,cketti/okhttp,square/okhttp,tiarebalbi/okhttp,yschimke/okhttp,jrodbx/okhttp,ansman/okhttp,ansman/okhttp,cmzy/okhttp,square/okhttp,cketti/okhttp,yschimke/okhttp,tiarebalbi/okhttp,ansman/okhttp,ze-pequeno/okhttp,ze-pequeno/okhttp,yschimke/okhttp,jrodbx/okhttp