input: Write a function to remove all punctuations from a given string of sentences. Return the cleaned string as the output. If the input string is empty, return an empty string.
  assert remove_punctuations("This is a sample string!")=="This is a sample string"
  assert remove_punctuations("Hello, World! How are you?")=="Hello World How are you"
  assert remove_punctuations("Don't forget to take the car.")=="Dont forget to take the car"
  assert remove_punctuations("This-here-is-a-test-string.")=="Thishereisateststring"
  assert remove_punctuations("")==""
output: def remove_punctuations(s):
      import string
      return s.translate(str.maketrans('', '', string.punctuation))