BUG: Repeated key words on datetime indexing methods (_parsed_string_to_bounds())

[boringow]

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• (optional) I have confirmed this bug exists on the master branch of pandas.

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Code Sample, a copy-pastable example

There is no need for code, as the error is on the function having repeated keywords.

Problem description

There are two repeated keywords on the master/pandas/core/indexes/datetimes.py#L560 and #L561.
I closed the issue #38121, as it is working fine, but as said, there are repeated keywords.

    valid_resos = {
        "year",
        "month",
        "quarter",
        "day",
        "hour",
        "minute",
        "second",
        "minute",
        "second",
        "millisecond",
        "microsecond",
    }

it should be:

    valid_resos = {
        "year",
        "month",
        "quarter",
        "day",
        "hour",
        "minute",
        "second",
        "millisecond",
        "microsecond",
    }

Reference here:

pandas/pandas/core/indexes/datetimes.py

Lines 560 to 561 in 0b16fb3

	"minute",
	"second",

Expected Output

    valid_resos = {
        "year",
        "month",
        "quarter",
        "day",
        "hour",
        "minute",
        "second",
        "millisecond",
        "microsecond",
    }

Output of pd.show_versions()

There is no need for versions. Pandas code in this case is fine. Just two repeated lines.

[boringow]

yayy! @MarcoGorelli my first ever contribution to any library!