title: Remove action woocommerce_single_variation_add_to_cart_button
body: <p>In WooCommerce you can find <a href="https://github.com/woothemes/woocommerce/blob/1b45bcde0b80d19b376fe7557c7bb38adef755bc/includes/wc-template-hooks.php#L153" rel="nofollow">this add_action</a>:</p>
  
  <pre><code>add_action( 'woocommerce_single_variation', 'woocommerce_single_variation_add_to_cart_button', 20 );
  </code></pre>
  
  <p>I don't manage to REMOVE this action with below code:</p>
  
  <pre><code>function remove_loop_button(){
  remove_action( 'woocommerce_single_variation', 'woocommerce_single_variation_add_to_cart_button', 20 );
  }
  add_action('init','remove_loop_button');
  </code></pre>
  
  <p>I'm trying to understand why, please help.</p>