[DeadCode] Skip return false pseudo type in union on RemoveUselessReturnTagRector

[samsonasik]

The following code is valid:

final class SkipReturnFalseOnUnionBool
{
    /**
     * @return false|\stdClass
     */
    function run(): bool|\stdClass
    {
        if (rand(0, 1)) {
            return false;
        }

        return new \stdClass();
    }
}

see https://phpstan.org/r/00534257-55dd-42d2-9104-c25aa5ca9872

[samsonasik]

All checks have passed 🎉 @TomasVotruba I am merging it ;)