input: Write a function to remove all punctuations from a given string. The function should return the cleaned string with no punctuation marks.
  assert remove_punctuations("Hello, World!")=="Hello World"
  assert remove_punctuations("This is a test sentence.")=="This is a test sentence"
  assert remove_punctuations("No punctuations here")=="No punctuations here"
  assert remove_punctuations("Another example: with punctuations!")=="Another example with punctuations"
  assert remove_punctuations("")==""
output: def remove_punctuations(s):
      import string
      return s.translate(str.maketrans('', '', string.punctuation))