input: Write a python function to filter out odd values from a provided list.
  assert remove_odd_numbers([1,2,3]) == [2]
  assert remove_odd_numbers([2,4,6]) == [2,4,6]
  assert remove_odd_numbers([10,20,3]) == [10,20]
output: def remove_odd_numbers(lst):
      return [num for num in lst if num % 2 == 0]