input: Write a python function to normalize text by removing punctuation and converting to lowercase.
  assert normalize_text("Hello, World!") == "hello world"
  assert normalize_text("Python's syntax is clear.") == "pythons syntax is clear"
  assert normalize_text("Normalize THIS text, please!") == "normalize this text please"
output: def normalize_text(text):
      import string
      
      # Remove punctuation
      text = text.translate(str.maketrans('', '', string.punctuation))
      
      # Convert to lowercase
      text = text.lower()
      
      return text