input: Write a python function to remove all punctuation from a given string.
  assert remove_punctuation("A text containing punctuation marks.") == "A text containing punctuation marks"
  assert remove_punctuation("Hello, World!") == "Hello World"
  assert remove_punctuation("Let's test, with: multiple; punctuation! marks.") == "Lets test with multiple punctuation marks"
output: def remove_punctuation(input_string):
      import string
      return ''.join(char for char in input_string if char not in string.punctuation)