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@@ -3365,22 +3365,6 @@ <h3>6.9 : Extending JavaScript Built-in's and Web API Constructors/Classes using
 
                 <p>Even, JavaScript web API's like the DOM can be extended.</p>
 
-
-                <div class="notes">
-
-                    <p>
-                        <strong>Notes:</strong>
-                    </p>
-                    <ol>
-                        <li>If you run the above code through Babel is will break. Sub-classing constructors/classes
-                            has to be supported natively. Transpiling and polyfilling
-                            can't help and in fact, will break the code. The environment either supports extending
-                            built-in classes/object or it does not. If you extend natives make sure you are not also
-                            babel'ifying/transpiling the code.</li>
-                    </ol>
-                </div>
-
-
             </div>
 
             <div id="chapter7" class="chapter">