Remove unused variables.
Remove unused variables.

attila-lendvai/iolib,dkochmanski/iolib,shamazmazum/iolib,vsedach/iolib-simple-mux,sionescu/iolib,attila-lendvai/iolib,shamazmazum/iolib,lispnik/iolib,tiago4orion/iolib,tiago4orion/iolib,sionescu/iolib,shamazmazum/iolib,dkochmanski/iolib,attila-lendvai/iolib,deadtrickster/iolib,lispnik/iolib,dkochmanski/iolib,vsedach/iolib-simple-mux,lispnik/iolib,deadtrickster/iolib,sionescu/iolib,deadtrickster/iolib,tiago4orion/iolib