input: Write a python function to remove a specific element from a list.
  assert remove_element([2, 3, 4, 5, 6], 5) == [2, 3, 4, 6]
  assert remove_element([1, 2, 3, 4, 5], 3) == [1, 2, 4, 5]
  assert remove_element([10, 20, 30, 40], 20) == [10, 30, 40]
output: def remove_element(lst, element):
      return [x for x in lst if x != element]