chore: remove obsolete staging environment from deployer config

deploy.php

@@ -103,22 +103,6 @@ host('prod')
     ->set('cachetool_args', '--web=SymfonyHttpClient --web-path={{current_path}}/public/ --web-url=https://hub.ep-reisen.de')
 ;
 
-host('staging')
-    ->setHostname('www198.your-server.de')
-    ->setRemoteUser('pfqasy')
-    ->setForwardAgent(true)
-    ->setSshMultiplexing(true)
-    ->setDeployPath('/usr/home/pfqasy/public_html/ephub.fromme.dev')
-    ->set('bin/php', '/usr/bin/php')
-    ->set('http_user', 'pfqasy')
-    ->set('rsync_src', __DIR__)
-    ->set('rsync', $rsyncOptions)
-    ->set('cachetool_args', '--web=SymfonyHttpClient --web-path={{current_path}}/public/ --web-url=https://ephub.fromme.dev')
-    ->add('shared_files', [
-        'public/.htpasswd',
-    ])
-;
-
 task('deploy', [
     'deploy:info',
     'deploy:setup',