qt5-ukui-platformtheme/ukui-styles/qt5-style-ukui/themeconfig/UKUIClassical.json

{
    "Radius":{
        "Max_Radius"    :  {"value":  "0", "type": "int"},
        "Normal_Radius" :  {"value":  "0", "type": "int"},
        "Min_Radius"    :  {"value":  "0", "type": "int"}
    }
}