minor #14088 remove useless tests that fail in php 7 (Tobion)

This PR was merged into the 2.3 branch.

Discussion
----------

remove useless tests that fail in php 7

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #14086 for Security and Form component
| License       | MIT
| Doc PR        | -

`@expectedException \PHPUnit_Framework_Error` doesn't catch php fatal errors for wrong types in php 7. But these test are also pretty useless anyway. Then we would have to add a lot of tests for all arguments that are typehinted. Let's just remove these tests.

Commits
-------

59cab27 remove useless tests that fail in php 7

src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php

@@ -66,16 +66,6 @@ protected function tearDown()
         $this->objectChoices = null;
     }
 
-    /**
-     * @expectedException \PHPUnit_Framework_Error
-     */
-    public function testChoicesOptionExpectsArray()
-    {
-        $this->factory->create('choice', null, array(
-            'choices' => new \ArrayObject(),
-        ));
-    }
-
     /**
      * @expectedException \Symfony\Component\OptionsResolver\Exception\InvalidOptionsException
      */

src/Symfony/Component/Security/Tests/Core/Authentication/Token/RememberMeTokenTest.php

@@ -52,23 +52,6 @@ public function testConstructorKeyCannotBeEmptyString()
         );
     }
 
-    /**
-     * @expectedException \PHPUnit_Framework_Error
-     * @dataProvider getUserArguments
-     */
-    public function testConstructorUserCannotBeNull($user)
-    {
-        new RememberMeToken($user, 'foo', 'foo');
-    }
-
-    public function getUserArguments()
-    {
-        return array(
-            array(null),
-            array('foo'),
-        );
-    }
-
     protected function getUser($roles = array('ROLE_FOO'))
     {
         $user = $this->getMock('Symfony\Component\Security\Core\User\UserInterface');