R 删除高分辨率中的网格线

我从highcharter软件包中创建了自己的绘图主题。我希望删除背景中的白色水平线。我尝试将“gridLineWidth”设置为0，但没有成功。这是我当前图表的图片。任何帮助都将不胜感激

my_theme = hc_theme(
  colors = c(
    "#5daa45","#0066b2","#d51f3a",   "#983794", "#ebe71c", "#5196bc"),
  chart = list(
    backgroundColor = "#242932",
    gridLineWidth = 0
  ),
  title = list(
    style = list(
      color = "#e8e8e8"
   #   fontFamily = "Lato"
    )
  ),
  subtitle = list(
    style = list(
      color = "#e8e8e8"
    #  fontFamily = "Shadows Into Light"
    )
  ),
  legend = list(
    itemStyle = list(
  #    fontFamily = "Tangerine",
      color = "#e8e8e8"
    ),
    itemHoverStyle = list(
      color = "#e8e8e8"
    )
  )
)

---

没有

*图表*.gridLineWidth

属性的API：

但是，

*yAxis*.gridLineWidth

和

*xAxis*.gridLineWidth

：和：）有一个