title: Remove a single row from a csv without copying files
body: <p>There are multiple SO questions addressing some form of this topic, but they all seem terribly inefficient for removing only a single row from a csv file (usually they involve copying the entire file). If I have a csv formatted like so:</p>
  
  <pre><code>fname,lname,age,sex
  John,Doe,28,m
  Sarah,Smith,27,f
  Xavier,Moore,19,m
  </code></pre>
  
  <p>What is the most efficient way to remove Sarah's row? If possible, I would like to avoid copying the entire file.</p>