title: Pandas - remove the label of the column index
body: <p>I have a dataframe as follows:</p>
  
  <pre><code>PLEASE_REMOVE  2013  2014  2015
   THIS_IS_EASY
  -------------------------------
            Bob     0     3     4
           Mary     2     3     6
  </code></pre>
  
  <p>The years (2013, 2014, 2015) are the column index labels.
  The names (Mary, Bob) are the row index labels.</p>
  
  <p>I have somehow managed to get labels for the row indices and column indices.</p>
  
  <p>Using <code>df.index.names = ['']</code> I can remove the THIS_IS_EASY bit.</p>
  
  <p>How can I remove the PLEASE_REMOVE bit?</p>
  
  <p>Desired output is:</p>
  
  <pre><code>               2013  2014  2015
   -------------------------------
            Bob     0     3     4
           Mary     2     3     6
  </code></pre>