title: How to remove a method from Action with parameter?
body: <p>I have an Action like this:</p>
  <pre><code>    Action&lt;string&gt; myAction;
  </code></pre>
  <p>I add a method in OnEnable() this way:</p>
  <pre><code>    myAction += param =&gt; 
      {
          Debug.Log(param);
      }
  </code></pre>
  <p>And later in OnDisable() I would like to remove it. How to do it?</p>