Editorial: remove unnecessarily verbose description (tc39#3691)

Author: bakkot

spec.html

@@ -42545,7 +42545,7 @@ <h1>
         </h1>
         <dl class="header">
           <dt>description</dt>
-          <dd>It is used to specify the creation of a new TypedArray using a constructor function that is derived from _exemplar_, and a _length_. Unlike TypedArraySpeciesCreate, which can construct custom TypedArray subclasses through the use of %Symbol.species%, this operation always uses one of the built-in TypedArray constructors.</dd>
+          <dd>It is used to specify the creation of a new TypedArray using a constructor function that is derived from _exemplar_. Unlike TypedArraySpeciesCreate, which can construct custom TypedArray subclasses through the use of %Symbol.species%, this operation always uses one of the built-in TypedArray constructors.</dd>
         </dl>
         <emu-alg>
           1. Let _constructor_ be the intrinsic object associated with the constructor name _exemplar_.[[TypedArrayName]] in <emu-xref href="#table-the-typedarray-constructors"></emu-xref>.