refactor this logic into better permission/state checks

[Al]

weinstein_server/app/Wine/Handler.php

Lines 100 to 105 in fcd121e

 // TODO: refactor this logic into better permission/state checks 
 if (array_key_exists('approvalnr', $data) && $competitionState->id > CompetitionState::STATE_ENROLLMENT) { 
 	unset($data['approvalnr']); 
 } 
  
 $validator = $this->validatorFactory->newWineValidator($wine, $data); 

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This issue was generated by todo based on a TODO comment in fcd121e when #199 was merged. cc @ChristophWurst.