title: To remove lines from a csv which have only commas
body: <p>I have a file which has some lines that have only commas, and no data. The issue is that the lines will not have fixed number of commas. The data may look like below-</p>
  
  <pre><code>99,abc,123,,
  bcd,123,th
  ,,bcd,123,th
  ,,,,bcd,123,th
  ,,,
  ,,,,,
  </code></pre>
  
  <p>the output should look like</p>
  
  <pre><code>99,abc,123,,
  bcd,123,th
  ,,bcd,123,th
  ,,,,bcd,123,th
  </code></pre>
  
  <p>I have to remove the lines which have only commas.</p>