[es6] Remove left-overs from Function.prototype.toMethod.

test/mjsunit/harmony/super.js

 // Copyright 2014 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.
 
 // Flags: --harmony-arrow-functions --allow-natives-syntax
 // Flags: --harmony-spreadcalls --harmony-destructuring
 // Flags: --harmony-rest-parameters --harmony-sloppy
 
 (function TestSuperNamedLoads() {
   function Base() { }
@@ skipping 63 matching lines @@
       assertEquals(27, this[x]);
       return "Derived";
     }
   };
 
   assertEquals("Base this is Base", new Base().f());
   assertEquals("Derived", new Derived().f());
 }());
 
 
-(function TestSuperNumericKeyedLoads() {
-  var x = 1;
-  var derivedDataProperty = 2;
-  var f = 3;
-
-  function Base() { }
-  function fBase() { return "Base " + this.toString(); }
-  Base.prototype[f] = %ToMethod(fBase, Base.prototype);
-  Base.prototype[x] = 15;
-  Base.prototype.toString = function() { return "this is Base"; };
-
-  function Derived() {
-    this[derivedDataProperty] = "xxx";
-  }
-  Derived.prototype = {
-    __proto__: Base.prototype,
-    toString() { return "this is Derived"; },
-    1: 27,
-    3() {
-      assertEquals("Base this is Derived", super[f]());
-      var a = super[x];
-      assertEquals(15, a);
-      assertEquals(15, super[x]);
-      assertEquals(27, this[x]);
-      return "Derived";
-    }
-  };
-
-  assertEquals("Base this is Base", new Base()[f]());
-  assertEquals("Derived", new Derived()[f]());
-}());
-
-
 (function TestSuperKeywordNonMethod() {
   'use strict';
 
   class C {
     f() {
       super.unknown();
     }
   }
 
   assertThrows(function() {
@@ skipping 2156 matching lines @@
   }
   class Derived extends Base {
     constructor(x) {
       let r = (() => super(...[x]))();
       assertEquals(this, r);
     }
   }
   let d = new Derived(42);
   assertSame(42, d.x);
 })();