Editorial: Delete <emu-note> in TimeClip clause

PR tc39#1827 (among other things) removed step 4 from the algorithm for TimeClip,
obsoleting the accompanying emu-note that describes "the point of step 4".

Conceivably, the note could be reworded to describe the effect of
'ToInteger' on step 3, but I don't think it'd be worth the bother.

spec.html

@@ -28542,9 +28542,6 @@ <h1>TimeClip ( _time_ )</h1>
           1. If abs(_time_) &gt; 8.64 &times; 10<sup>15</sup>, return *NaN*.
           1. Return ! ToInteger(_time_).
         </emu-alg>
-        <emu-note>
-          <p>The point of step 4 is that an implementation is permitted a choice of internal representations of time values, for example as a 64-bit signed integer or as a 64-bit floating-point value. Depending on the implementation, this internal representation may or may not distinguish *-0* and *+0*.</p>
-        </emu-note>
       </emu-clause>
 
       <emu-clause id="sec-date-time-string-format">