input: Write a python function to remove a specified item from a list.
  assert removeItem([1, 2, 3, 4, 2, 5, 2], 2) == [1, 3, 4, 5]
  assert removeItem([10, 20, 30, 40, 20, 50, 20], 20) == [10, 30, 40, 50]
  assert removeItem([5, 7, 9, 8, 6, 4, 3], 8) == [5, 7, 9, 6, 4, 3]
output: def removeItem(lst, item):
      return [x for x in lst if x != item]