harness: Remove hidden-constructors harness file

The objects it provides are also available in another harness file,
wellKnownIntrinsicObjects.js. There's no point in duplicating that in the
harness. Rewrite each test that used hidden-constructors.js to use
getWellKnownIntrinsicObject instead.

harness/hidden-constructors.js

@@ -1,27 +0,0 @@
-// Copyright (C) 2020 Rick Waldron. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-description: |
-  Provides uniform access to built-in constructors that are not exposed to the global object.
-defines:
-  - AsyncFunction
-  - AsyncGeneratorFunction
-  - GeneratorFunction
----*/
-
-var AsyncFunction;
-var AsyncGeneratorFunction;
-var GeneratorFunction;
-
-try {
-  AsyncFunction = Object.getPrototypeOf(new Function('return async function dummy() {}')()).constructor;
-} catch(e) {}
-
-try {
-  AsyncGeneratorFunction = Object.getPrototypeOf(new Function('return async function* dummy() {}')()).constructor;
-} catch(e) {}
-
-try {
-  GeneratorFunction = Object.getPrototypeOf(new Function('return function* dummy() {}')()).constructor;
-} catch(e) {}

test/built-ins/AsyncFunction/is-a-constructor.js

@@ -15,10 +15,10 @@ info: |
   If Type(argument) is not Object, return false.
   If argument has a [[Construct]] internal method, return true.
   Return false.
-includes: [isConstructor.js, hidden-constructors.js]
+includes: [isConstructor.js, wellKnownIntrinsicObjects.js]
 features: [Reflect.construct]
 ---*/
 
+var AsyncFunction = getWellKnownIntrinsicObject('%AsyncFunction%');
 assert.sameValue(isConstructor(AsyncFunction), true, 'isConstructor(AsyncFunction) must return true');
 new AsyncFunction();
-  

test/built-ins/AsyncGeneratorFunction/is-a-constructor.js

@@ -15,14 +15,14 @@ info: |
   If Type(argument) is not Object, return false.
   If argument has a [[Construct]] internal method, return true.
   Return false.
-includes: [isConstructor.js, hidden-constructors.js]
+includes: [isConstructor.js, wellKnownIntrinsicObjects.js]
 features: [Reflect.construct]
 ---*/
 
+var AsyncGeneratorFunction = getWellKnownIntrinsicObject('%AsyncGeneratorFunction%');
 assert.sameValue(
   isConstructor(AsyncGeneratorFunction),
   true,
   'isConstructor(AsyncGeneratorFunction) must return true'
 );
 new AsyncGeneratorFunction();
-  

test/built-ins/GeneratorFunction/is-a-constructor.js

@@ -15,10 +15,10 @@ info: |
   If Type(argument) is not Object, return false.
   If argument has a [[Construct]] internal method, return true.
   Return false.
-includes: [isConstructor.js, hidden-constructors.js]
+includes: [isConstructor.js, wellKnownIntrinsicObjects.js]
 features: [Reflect.construct]
 ---*/
 
+var GeneratorFunction = getWellKnownIntrinsicObject('%GeneratorFunction%');
 assert.sameValue(isConstructor(GeneratorFunction), true, 'isConstructor(GeneratorFunction) must return true');
 new GeneratorFunction();
-  

test/language/expressions/async-arrow-function/prototype.js

@@ -11,7 +11,8 @@ info: |
     6. Let closure be OrdinaryFunctionCreate(%AsyncFunction.prototype%, sourceText, parameters,
        AsyncConciseBody, lexical-this, env, privateEnv).
     ...
-includes: [hidden-constructors.js]
+includes: [wellKnownIntrinsicObjects.js]
 ---*/
 
+var AsyncFunction = getWellKnownIntrinsicObject('%AsyncFunction%');
 assert.sameValue(Object.getPrototypeOf(async () => {}), AsyncFunction.prototype);