input: Write a function to remove all punctuations from a given string of sentences. The function should return the cleaned string without any punctuations.
  assert remove_punctuations("Hello, world!")=="Hello world"
  assert remove_punctuations("Python is great!")=="Python is great"
  assert remove_punctuations("This is a test, right?")=="This is a test right"
  assert remove_punctuations("No punctuations here")=="No punctuations here"
  assert remove_punctuations("One more: test;")=="One more test"
output: def remove_punctuations(s):
      import string
      return s.translate(str.maketrans('', '', string.punctuation))