title: grepping/awking to remove entire line that contains a specific character
body: <p>I have a grep (possibly awk?) question.
  I have the following data (2 col, tab-separated).</p>
  
  <pre><code>a._testudineus  anm
  a_battery   art
  a_capella_singing   act|psy
  a_cappella_singing  act|psy
  </code></pre>
  
  <p>I want to remove all LINES that contain the character "|"</p>
  
  <p>For instance, my desired result would be the following:</p>
  
  <pre><code>a._testudineus  anm
  a_battery   art
  </code></pre>
  
  <p>Is there a quick/efficient grep/awk that can help me with this?
  The data is very large (approx 5GB).</p>
  
  <p>Thanks in advance.</p>