title: Remove specific field of yaml file using YamlDotNet
body: <p>I'm developing an application which reads a yaml file. Let's say the yaml file has the following content:</p>
  <pre><code>field1: 'test1'
  field2: 'test2'
  field3: 'test3'
  </code></pre>
  <p>So I want to remove only the filed2 as so the new yaml file would be:</p>
  <pre><code>field1: 'test1'
  field3: 'test3'
  </code></pre>
  <p>How would I do it using the YamlDotNet library?</p>