input: from typing import List
  
  def remove_all_punctuations(sentences: List[str]) -> List[str]:
      """ Removes all punctuations from a list of sentences.
      >>> remove_all_punctuations(["This is a sample string!", "No punctuation here."])
      ['This is a sample string', 'No punctuation here']
      """
output:     import string
      return [sentence.translate(str.maketrans('', '', string.punctuation)) for sentence in sentences]