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

R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2004933003
Cr-Commit-Position: refs/heads/master@{#36457}

src/js/math.js

@@ -16,7 +16,6 @@ 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;

src/js/string.js

@@ -13,8 +13,6 @@ var ArrayIndexOf;
 var ArrayJoin;
 var GlobalRegExp = global.RegExp;
 var GlobalString = global.String;
-var InternalArray = utils.InternalArray;
-var InternalPackedArray = utils.InternalPackedArray;
 var IsRegExp;
 var MakeRangeError;
 var MakeTypeError;

src/js/v8natives.js

@@ -12,7 +12,6 @@
 var GlobalArray = global.Array;
 var GlobalNumber = global.Number;
 var GlobalObject = global.Object;
-var InternalArray = utils.InternalArray;
 var iteratorSymbol = utils.ImportNow("iterator_symbol");
 var MakeRangeError;
 var MakeSyntaxError;