title: remove rows which are not aligned with any of the column in pandas dataframe
body: <p>I have below dataframe where I have four columns but at the same time I see the Index position <code>8</code> which is not aligned with any of the dataframe column, Is there a way to remove it based on some condition?</p>
  
  <p>However, I can remove it with <code>df.iloc[:-1]</code> as I know its last row in the dataframe, but looking for some conditional checks if there are multiple such columns.</p>
  
  <pre><code>                    Locations    Cases Deaths Recovered
  0               United States  1104149  63982    132941
  1                       Spain   215216  24824    114678
  2                       Italy   205463  27967     75945
  3              United Kingdom   177454  27510         —
  4                     Germany   163432   6637    117734
  5                      France   129581  24376     49476
  8  As of 1 May 2020 (UTC) · History of cases: Chi...  As of 1 May 2020 (UTC) · History of cases: Chi...  As of 1 May 2020 (UTC) · History of cases: Chi...  As of 1 May 2020 (UTC) · History of cases: Chi...
  </code></pre>