input: Write a function to remove all punctuations from a given string. The function should return the modified string without any punctuation marks.
  
  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("Test: This is a test.") == "Test This is a test"
  assert remove_punctuations("No punctuation here") == "No punctuation here"
  assert remove_punctuations("") == ""
output: def remove_punctuations(s):
      return s.translate(str.maketrans('', '', string.punctuation))