input: Write a function to remove all occurrences of a specified item from a given list. The function should return the modified list after removing all instances of the specified item. If the list is empty or the item is not found, the function should simply return the original list.
  assert removeItem([1, 2, 3, 4, 2, 5, 2], 2) == [1, 3, 4, 5]
  assert removeItem([3, 5, 1, 2, 2, 2], 2) == [3, 5, 1]
  assert removeItem([6, 7, 8, 9], 2) == [6, 7, 8, 9]
  assert removeItem([], 1) == []
  assert removeItem([1, 1, 1, 1], 1) == []
output: def removeItem(lst, item):
      return [x for x in lst if x != item]