def remove_middle(lst, start, end):
  for i in range(start, end+1):
    del(lst[i])
  return lst

print(remove_middle([4, 8, 15, 16, 23, 42], 1, 3))

def remove_middle(lst, start, end):
    return [val for i, val in enumerate(lst) if i not in range(start, end+1)]