Editorial: drop mention of stability from Array.prototype.sort introd…

…uction (#3424)

spec.html

@@ -39738,7 +39738,7 @@ <h1>Array.prototype.some ( _callback_ [ , _thisArg_ ] )</h1>
 
       <emu-clause id="sec-array.prototype.sort" oldids="sec-sortcompare">
         <h1>Array.prototype.sort ( _comparator_ )</h1>
-        <p>This method sorts the elements of this array. The sort must be stable (that is, elements that compare equal must remain in their original order). If _comparator_ is not *undefined*, it should be a function that accepts two arguments _x_ and _y_ and returns a negative Number if _x_ &lt; _y_, a positive Number if _x_ > _y_, or a zero otherwise.</p>
+        <p>This method sorts the elements of this array. If _comparator_ is not *undefined*, it should be a function that accepts two arguments _x_ and _y_ and returns a negative Number if _x_ &lt; _y_, a positive Number if _x_ > _y_, or a zero otherwise.</p>
         <p>It performs the following steps when called:</p>
         <emu-alg>
           1. [id="step-array-sort-comparefn"] If _comparator_ is not *undefined* and IsCallable(_comparator_) is *false*, throw a *TypeError* exception.