code: protected function execute(InputInterface $input, OutputInterface $output): void
      {
          $fs = new Filesystem();
          $path = $this->projectDir.'/.env';
  
          if (!$fs->exists($path)) {
              return;
          }
  
          $content = '';
          $lines = file($path, FILE_IGNORE_NEW_LINES);
  
          if (false === $lines) {
              throw new \RuntimeException(sprintf('Could not read "%s" file.', $path));
          }
  
          $key = $input->getArgument('key');
  
          foreach ($lines as $line) {
              if (0 === strpos($line, $key.'=')) {
                  continue;
              }
  
              $content .= $line."\n";
          }
  
          if (empty($content)) {
              $fs->remove($path);
          } else {
              $fs->dumpFile($path, $content);
          }
      }
docs: {@inheritdoc}