title: Remove axis titles from Seaborn PairGrid
body: <p>I've tried using the <a href="https://stackoverflow.com/a/34275363/1840471">answer</a> to <a href="https://stackoverflow.com/q/34275140/1840471">Hide Axis Titles in Seaborn</a>, which applies to <code>heatmap</code>, but end up with two plots instead: the first being an empty grid without axis titles, the second being the <code>PairGrid</code> but still with axis titles. How can I hide the axis titles on the <code>PairGrid</code>?</p>
  
  <pre><code>import matplotlib.pyplot as plt
  import seaborn as sns
  
  iris = sns.load_dataset('iris')
  
  fig, ax = plt.subplots(1, 1, figsize = (10, 10), dpi=300)
  sns.PairGrid(iris).map_diag(sns.distplot)
  ax.set_ylabel('')    
  ax.set_xlabel('')
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/xqNE9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xqNE9.png" alt="plot 1 - empty grid with no labels"></a></p>
  
  <p><a href="https://i.stack.imgur.com/5bSiA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5bSiA.png" alt="plot 2 - normal plot with labels"></a></p>