title: Removing the borders in geom_boxplot in ggplot2
body: <p>This should seem relatively straightforward but I can't find an argument which would allow me to do this and I've searched Google and Stack for an answer.</p>
  
  <p>Sample code:</p>
  
  <pre><code>library(ggplot2)
  library(plotly)
  
  dat &lt;- data.frame(cond = factor(rep(c("A","B"), each=200)), rating = c(rnorm(200),rnorm(200, mean=.8)))
  
  p &lt;- ggplot(dat, aes(x=cond, y=rating, fill=cond)) + geom_boxplot()
  
  p &lt;- ggplotly(p)
  </code></pre>
  
  <p>This outputs the first graph, I would want something like the second.
  <img src="https://i.stack.imgur.com/eRm8W.png" alt="Fig"></p>
  
  <p>I tried including <code>colour=cond</code> but that gets rid of the median.</p>