input: Write a function to remove all punctuation from a given string of sentences. If the input string is empty, return an empty string.
  import string
  
  def remove_punctuations(s):
      return s.translate(str.maketrans('', '', string.punctuation))
  
  assert remove_punctuations("This is a sample string!") == "This is a sample string"
  assert remove_punctuations("Hello, world!") == "Hello world"
  assert remove_punctuations("Is this a test? Yes, it is.") == "Is this a test Yes it is"
  assert remove_punctuations("No punctuation here.") == "No punctuation here"
  assert remove_punctuations("") == ""
output: import string
  
  def remove_punctuations(s):
      return s.translate(str.maketrans('', '', string.punctuation))