Create a function that takes a URL (string), removes duplicate query parameters and parameters specified within the 2nd argument (which will be an optional list).
strip_url_params("https://innokodakademija.com?a=1&b=2&a=2") ➞ "https://innokodakademija.com?a=2&b=2"
strip_url_params("https://innokodakademija.com?a=1&b=2&a=2", ["b"]) ➞ "https://innokodakademija.com?a=2"
strip_url_params("https://innokodakademija.com", ["b"]) ➞ "https://innokodakademija.com"
params_to_strip is optional.params_to_strip can contain multiple params.