title: Should I clean-up handlePress variables in useEffect?
body: <p>I'm new to react native and something is really confusing to me. What type of objects should I cleanup before the component unMount? I know I should clean all the API calls, what else?? Let's say I have a button like this</p>
  <pre><code> const _renderTruncatedFooter = (handlePress) =&gt; {
      return (
        &lt;Text
          onPress={handlePress}&gt;
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        &lt;/Text&gt;
      );
    };
  </code></pre>
  <p>Should I cleanup buttons in useEffect return?</p>