title: Dart remove item form list if value equal other value
body: <p>Hi i have list <code>List&lt;ProductDetails&gt;</code> like that i want remove item if price value equal others</p>
  
  <p>1 Gold 1$
  5 Gold 1$
  10 Gold 1$</p>
  
  <pre><code>ProductDetails(
        {@required this.id,
        @required this.title,
        @required this.description,
        @required this.price,
        this.skProduct,
        this.skuDetail});
  </code></pre>
  
  <p>I want to remove 1 gold and 5 gold just show 10 gold how can i do it ?</p>
  
  <p>Im sorted list like that </p>
  
  <pre><code>List&lt;ProductDetails&gt; _productsSorted = _products
        ..sort((a, b) =&gt; a.price.compareTo(b.price));
  </code></pre>
  
  <p>Thank you</p>