docs: remove duplicate values: Set

[coderaiser]

Added example using Set:

const removeDuplicate = arr => Array.from(new Set(arr));

[robinpokorny]

Hey, this whole entry is a duplicate of https://1loc.dev/#get-the-unique-values-of-an-array

I'd say we should remove remove duplicate values as the best solution is what @coderaiser proposed and which is already in the other entry.

[elkarouani]

As I see about the "remove duplicate values" post, its purpose is to remove every element that is repeated in the array and returning the list that contains every element doesn't repeated in the input list.

[robinpokorny]

Hey @elkarouani, thank you. You’re absolutely right, this is a different function.
Then this PR should be closed as the proposed solution does something different.
I also think that this function should be renamed. Something along the lines removeRepeated or keepNonRepeated.