input: Write a function to remove all the occurrences of a given item from a list. If the given list is empty, return an empty list.
  assert removeItem([1, 2, 3, 4, 2, 5, 2], 2)==[1, 3, 4, 5]
  assert removeItem([1, 2, 3, 4, 5], 6)==[1, 2, 3, 4, 5]
  assert removeItem([], 2)==[]
  assert removeItem([2, 2, 2, 2], 2)==[]
output: def removeItem(lst, item):
      return [x for x in lst if x != item]