input: Write a python function to remove a specified number of characters from the front of a string.
  assert remove_from_front("Hello, World!", 5) == ", World!"
  assert remove_from_front("Python Programming", 7) == "Programming"
  assert remove_from_front("Data Science", 5) == "Science"
output: def remove_from_front(s: str, n: int) -> str:
      return s[n:]