Method discard

src/urllib3/_collections.py:300–304

(self, key: str)

            yield vals[0]

    def discard(self, key: str) -> None:
        try:
            del self[key]
        except KeyError:
            pass

    def add(self, key: str, val: str, *, combine: bool = False) -> None:
        """Adds a (name, value) pair, doesn't overwrite the value if it already