Clean skippable tests that are never skipped

Author: fancyweb

Tests/Command/LintCommandTest.php

@@ -92,10 +92,6 @@ public function testLintIncorrectFileWithGithubFormat()
 
     public function testLintAutodetectsGithubActionEnvironment()
     {
-        if (!class_exists(GithubActionReporter::class)) {
-            $this->markTestSkipped('The "github" format is only available since "symfony/console" >= 5.3.');
-        }
-
         $prev = getenv('GITHUB_ACTIONS');
         putenv('GITHUB_ACTIONS');
 
@@ -170,10 +166,6 @@ public function testLintFileNotReadable()
      */
     public function testComplete(array $input, array $expectedSuggestions)
     {
-        if (!class_exists(CommandCompletionTester::class)) {
-            $this->markTestSkipped('Test command completion requires symfony/console 5.4+.');
-        }
-
         $tester = new CommandCompletionTester($this->createCommand());
 
         $this->assertSame($expectedSuggestions, $tester->complete($input));