如何删除重复的行？

lines = [
    "line1",
    "line2",
    "line3",
    "line1",
    "line2",
]

unique_lines = list(set(lines))

for line in unique_lines:
    print(line)

import java.util.HashSet;
import java.util.Set;

public class RemoveDuplicateLines {
    public static void main(String[] args) {
        String[] lines = {
            "line1",
            "line2",
            "line3",
            "line1",
            "line2",
        };

        Set<String> uniqueLines = new HashSet<>();
        for (String line : lines) {
            uniqueLines.add(line);
        }

        for (String line : uniqueLines) {
            System.out.println(line);
        }
    }
}

const lines = [
    "line1",
    "line2",
    "line3",
    "line1",
    "line2",
];

const uniqueLines = new Set(lines);

for (const line of uniqueLines) {
    console.log(line);
}