title: Take too long Hidden/Post FX/Uber Shader in post processing plugin
body: <p>2D project (Unity 2018.3.0)</p>
  
  <ol>
  <li>I download the plugin of Unity Post Procesing</li>
  <li><p>Add to the camera the script
  <a href="https://imgur.com/a/EduR7zw" rel="nofollow noreferrer">https://imgur.com/a/EduR7zw</a></p></li>
  <li><p>Configurate only Color Grading
  <a href="https://imgur.com/a/1tPOc4r" rel="nofollow noreferrer">https://imgur.com/a/1tPOc4r</a></p></li>
  <li><p>Try to build and it takes too long cause appear in the charge bar Shaders.
  <a href="https://imgur.com/a/IhHBhTH" rel="nofollow noreferrer">https://imgur.com/a/IhHBhTH</a></p></li>
  </ol>
  
  <p>Any solution here? </p>