input: Write a python function to remove all punctuation from a given sentence.
  assert remove_punctuation("Hello, world!") == "Hello world"
  assert remove_punctuation("Good morning! How are you today?") == "Good morning How are you today"
  assert remove_punctuation("Welcome to Python programming.") == "Welcome to Python programming"
  assert remove_punctuation("Let's test: does this work?") == "Lets test does this work"
output: import string
  
  def remove_punctuation(sentence):
      return sentence.translate(str.maketrans('', '', string.punctuation))