title: Remove row by row number in a dataframe
body: <p>I would like to create a very simple function that will take the dataframe and row number as arguemnts, and then return a dataframe without that row. So if I have:</p>
  
  <pre><code>1 ben
  2 adrian
  3 bill
  4 matthew
  </code></pre>
  
  <p>After calling remove(3,df) I will get:</p>
  
  <pre><code>1 ben
  2 adrian
  3 matthew
  </code></pre>
  
  <p>Anyone can help out?</p>