remove redundant abs from MIN_IOU_VALUE
remove redundant abs from MIN_IOU_VALUE

ripple/ripple-lib,ripple/ripple-lib,darkdarkdragon/ripple-lib,ripple/ripple-lib,ripple/ripple-lib,darkdarkdragon/ripple-lib,darkdarkdragon/ripple-lib,wilsonianb/ripple-lib,wilsonianb/ripple-lib,wilsonianb/ripple-lib