Do not install Symfony Flex - php

Question

Everytime i run composer install it creates controller directory and adds kernel.php
I am not sure whats happening, i have doubt that symphony flex is doing something.
This kernel.php is of no use to me and due to this file, my app breaks
my composer.json
{
"name": "My App",
"description": "my app",
"keywords": ["app"],
"license": "MIT",
"type": "project",
"minimum-stability": "dev",
"prefer-stable": true,
"require": {
"php": ">=7.2.0"
},
"require-dev": {
"fzaninotto/faker": "~1.0",
"mockery/mockery": "~1.0",
"phpunit/phpunit": "~7.0",
"squizlabs/php_codesniffer": "~3.0",
"phpmd/phpmd": "~2.0",
"phing/phing": "~2.0",
"phpdocumentor/phpdocumentor": "~3.0",
"sebastian/phpcpd": "~4.0",
"phploc/phploc": "~4.0",
"vektah/bugfree-dangerzone": "~0.4",
"amnuts/opcache-gui": "~2.0",
"rlerdorf/opcache-status": "dev-master",
"peehaa/opcachegui": "master",
"friendsofphp/php-cs-fixer": "~2.0",
"johnkary/phpunit-speedtrap": "~3.0"
},
"autoload": {
"exclude-from-classmap": ["/tests/"],
"psr-4": {
"Entities\\": "src/Entities/",
"Helpers\\": "src/Helpers/",
"Factories\\": "src/Factories/",
"Repositories\\": "src/Repositories",
"Requests\\": "src/Requests/",
"Responses\\": "src/Responses/",
"UseCases\\": "src/UseCases/"
}
},
"autoload-dev": {
"psr-4": {
"TestHelpers\\": "tests/Helpers",
"UnitTest\\": "tests/Unit/"
}
},
"scripts": {
"post-root-package-install": [
"#php -r \"file_exists('.env') || copy('.env.example', '.env');\""
]
},
"config": {
"preferred-install": "dist",
"sort-packages": true,
"optimize-autoloader": true
}
}
kernel.php content
<?php
namespace App;
use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel as BaseKernel;
use Symfony\Component\Routing\RouteCollectionBuilder;
class Kernel extends BaseKernel
Also i get this on my terminal when i run composer update
- WARNING jms/serializer-bundle (>=2.0): From github.com/symfony/recipes-contrib:master
The recipe for this package comes from the "contrib" repository, which is open to community contributions.
Review the recipe at https://github.com/symfony/recipes-contrib/tree/master/jms/serializer-bundle/2.0
Do you want to execute this recipe?
[y] Yes
[n] No
[a] Yes for all packages, only for the current installation session
[p] Yes permanently, never ask again for this project
(defaults to n):
my tests break
PHPUnit 7.2.4 by Sebastian Bergmann and contributors.
Fatal error: Cannot declare class App\Kernel, because the name is already in use in /www/base_site/src/Kernel.php on line 12
Call Stack:
0.0003 393112 1. {main}() /www/base_site/vendor/phpunit/phpunit/phpunit:0
0.0488 2886864 2. PHPUnit\TextUI\Command::main() /www/base_site/vendor/phpunit/phpunit/phpunit:53
0.0488 2886976 3. PHPUnit\TextUI\Command->run() /www/base_site/vendor/phpunit/phpunit/src/TextUI/Command.php:156
0.2294 7201648 4. PHPUnit\TextUI\TestRunner->doRun() /www/base_site/vendor/phpunit/phpunit/src/TextUI/Command.php:203
0.2886 7750008 5. PHPUnit\Framework\TestSuite->run() /www/base_site/vendor/phpunit/phpunit/src/TextUI/TestRunner.php:566
0.2959 7759160 6. PHPUnit\Framework\TestSuite->run() /www/base_site/vendor/phpunit/phpunit/src/Framework/TestSuite.php:776
0.3043 7759760 7. UnitTest\Entity\AccountTest->run() /www/base_site/vendor/phpunit/phpunit/src/Framework/TestSuite.php:776
0.3044 7759760 8. PHPUnit\Framework\TestResult->run() /www/base_site/vendor/phpunit/phpunit/src/Framework/TestCase.php:805
0.3053 7773536 9. SebastianBergmann\CodeCoverage\CodeCoverage->start() /www/base_site/vendor/phpunit/phpunit/src/Framework/TestResult.php:606
0.3053 7773536 10. SebastianBergmann\CodeCoverage\CodeCoverage->initializeData() /www/base_site/vendor/phpunit/php-code-coverage/src/CodeCoverage.php:243
0.3287 8329976 11. include_once('/www/base_site/src/Kernel.php') /www/base_site/vendor/phpunit/php-code-coverage/src/CodeCoverage.php:948
Process finished with exit code 255
Is there anyway to resolve this issue?