remove unneeded initialization
remove unneeded initialization

jibsen/imgmin,pornel/imgmin,micmro/imgmin,rflynn/imgmin,rflynn/imgmin,jibsen/imgmin,pornel/imgmin,micmro/imgmin,rflynn/imgmin,micmro/imgmin,jibsen/imgmin,pornel/imgmin,micmro/imgmin,pornel/imgmin,rflynn/imgmin,jibsen/imgmin