Revert "GeneratorFunction() makes generator instances"

test/mjsunit/harmony/generators-iteration.js

Index: test/mjsunit/harmony/generators-iteration.js
diff --git a/test/mjsunit/harmony/generators-iteration.js b/test/mjsunit/harmony/generators-iteration.js
index 39e686604ab7cdff43d390c16bf9d8d3d74007c7..e717f1b4a3207518d69a14506f1f9827b5bd406a 100644
--- a/test/mjsunit/harmony/generators-iteration.js
+++ b/test/mjsunit/harmony/generators-iteration.js
@@ -324,28 +324,6 @@ TestGenerator(
     "foo",
     [2, "1foo3", 5, "4foo6", "foofoo"]);
 
-// Generator function instances.
-TestGenerator(GeneratorFunction(),
-              [undefined],
-              "foo",
-              [undefined]);
-
-TestGenerator(new GeneratorFunction(),
-              [undefined],
-              "foo",
-              [undefined]);
-
-TestGenerator(GeneratorFunction('yield 1;'),
-              [1, undefined],
-              "foo",
-              [1, undefined]);
-
-TestGenerator(
-    function() { return GeneratorFunction('x', 'y', 'yield x + y;')(1, 2) },
-    [3, undefined],
-    "foo",
-    [3, undefined]);
-
 function TestTryCatch(instantiate) {
   function* g() { yield 1; try { yield 2; } catch (e) { yield e; } yield 3; }
   function Sentinel() {}