title: How to hide specific messages in woocommerce?
body: <p>i want to hide/remove specific messages from woo commerce without modifying basic woocommerce plugin.
  There are several types of messages related to coupon like </p>
  
  <ol>
  <li>Coupon code already applied!  </li>
  <li>Sorry! Coupon 12345 already applied to your cart. (here i essentially want to hide coupon code)</li>
  </ol>
  
  <p>and several others similar to these coupon codes.</p>
  
  <p>i just want to hide these type of coupon/cart messages, others are fine like "Product successfully added!"  or any other error messages.</p>
  
  <p>Basically the aim is to show all other messages (Error and success messages) but dont wanna show coupon messages and a coupon code in to these messages.</p>
  
  <p>So, is there any way to do this by doing any hook etc, like one i've found to eliminate all message strings (if i am not wrong).</p>
  
  <pre><code>add_filter( 'woocommerce_coupon_message', '__return_empty_string' );
  </code></pre>
  
  <ol start="2">
  <li>One more thing is, one message is repeating on cart page several times when i add product in to the car. "Coupon code already applied!" 2,3, to 4 times. </li>
  </ol>