title: setTimeout() outputs a non expected number/timer
body: <p>I'm trying to call the creator of action inside my <code>Action.js</code> to remove the alert after 3000ms with setTimeout(), and it outputs a number/timer <code>61</code> at the end of the message.</p>
  
  <p>How can I remove this <code>61</code>.</p>
  
  <p>Output:</p>
  
  <pre><code>Password too short (min 6 characs.)61
  </code></pre>
  
  <p>Code:</p>
  
  <pre><code>const Alert = props =&gt; {
    return (
      &lt;div&gt;
        {props.alert &amp;&amp; (
          &lt;div className={`alert alert-${props.alert.type}`}&gt;
            &lt;i className="fas fa-info-circle"&gt; {props.alert.msg}&lt;/i&gt;
            {setTimeout(() =&gt; props.removeAlert(), 3000)}
          &lt;/div&gt;
        )}
      &lt;/div&gt;
    );
  };
  </code></pre>
  
  <p>Thank you.</p>