input: Write a python function to eliminate odd integers from an input list.
  assert remove_odds([1,2,3]) == [2]
  assert remove_odds([2,4,6]) == [2,4,6]
  assert remove_odds([10,20,3]) == [10,20]
output: def remove_odds(lst):
      return [x for x in lst if x % 2 == 0]