[es6] Fix the %TypedArray% constructor.

src/js/typedarray.js

Index: src/js/typedarray.js
diff --git a/src/js/typedarray.js b/src/js/typedarray.js
index b889d8bafc252c6eac6decfa9fb15831e63ce24b..488e94912114eab13691a82e2231d2d19782c02a 100644
--- a/src/js/typedarray.js
+++ b/src/js/typedarray.js
@@ -844,12 +844,7 @@ function TypedArrayFrom(source, mapfn, thisArg) {
 
 // TODO(bmeurer): Migrate this to a proper builtin.
 function TypedArrayConstructor() {
-  if (IS_UNDEFINED(new.target)) {
-    throw %make_type_error(kConstructorNonCallable, "TypedArray");
-  }
-  if (new.target === GlobalTypedArray) {
-    throw %make_type_error(kConstructAbstractClass, "TypedArray");
-  }
+  throw %make_type_error(kConstructAbstractClass, "TypedArray");
 }
 
 function TypedArraySpecies() {