[builtins] Remove a few dead imports of InternalArray/InternalPackedArray.

src/js/math.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function(global, utils) {
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
 // The first two slots are reserved to persist PRNG state.
 define kRandomNumberStart = 2;
 
 var GlobalFloat64Array = global.Float64Array;
 var GlobalMath = global.Math;
 var GlobalObject = global.Object;
-var InternalArray = utils.InternalArray;
 var NaN = %GetRootNaN();
 var nextRandomIndex = 0;
 var randomNumbers = UNDEFINED;
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
 //-------------------------------------------------------------------
 
 // ECMA 262 - 15.8.2.1
 function MathAbs(x) {
   x = +x;
@@ skipping 185 matching lines @@
 // -------------------------------------------------------------------
 // Exports
 
 utils.Export(function(to) {
   to.MathAbs = MathAbs;
   to.MathExp = MathExp;
   to.IntRandom = MathRandomRaw;
 });
 
 })