Remove ignored errors in phpstan which have been resolved upstream

[teohhanhui]

Q	A
Bug fix?	no
New feature?	no
BC breaks?	no
Deprecations?	no
Tests pass?	yes
Fixed tickets	N/A
License	MIT
Doc PR	N/A

symfony/symfony#31903 was released.

[teohhanhui]

Hmm... I'm not sure why this is still failing.

But this is OK: https://phpstan.org/r/d3b13b8f-d91a-4384-81a3-0cc4e81ef2c3

@ondrejmirtes Perhaps you have an idea of what's going on?

[ondrejmirtes]

Please check out what type each expression has:

$client = static::createClient();
$client === 'aaa';
$client->getResponse() === 'aaa';

A rule starting with Strict comparison between ... will tell you what the type is. There's no magic, PHPStan just reads native typehints and phpDocs, so you can figure that out.

[teohhanhui]

Okay, so the problem seems to me like symfony/framework-bundle 4.2 is not forward compatible with symfony/http-kernel 4.3 😞

[teohhanhui]

Will be fixed by symfony/symfony#32213

In the meantime, we can already remove these ignored errors on master.

[teohhanhui]

Obsoleted by #2925