title: python seaborn FutureWarning - does not show plot
body: <p>I'm running python 3.6.1 on Anaconda.
  Whenever I try plotting with seaborn, I get the following warning.</p>
  
  <pre><code>C:\Anaconda3\lib\site-packages\seaborn\categorical.py:1428: FutureWarning: remove_na is deprecated and is a private function. Do not use.
    stat_data = remove_na(group_data)
  </code></pre>
  
  <p>even if I try with the barplot example posted on the page below,
  <a href="https://seaborn.pydata.org/generated/seaborn.barplot.html" rel="nofollow noreferrer">https://seaborn.pydata.org/generated/seaborn.barplot.html</a></p>
  
  <p>I still get the same result.</p>
  
  <p>Thanks in advance.</p>
  
  <hr>
  
  <p>I simplified the code. But the result is the same as well</p>
  
  <p>[this is the same code from <a href="https://seaborn.pydata.org/generated/seaborn.barplot.html" rel="nofollow noreferrer">https://seaborn.pydata.org/generated/seaborn.barplot.html</a> ]</p>
  
  <pre><code>import seaborn as sns
  
  sns.set_style("whitegrid")
  tips = sns.load_dataset("tips")
  sns.barplot(x="day", y="total_bill", data=tips)
  </code></pre>