TEST: Py312

[braingram]

Removes fsspec from our test dependencies to allow the python 3.12 tests to run.

Based off changes in: #1633

[pllim]

Hmm I am seeing this downstream. How did you get past it?

asdf/_jsonschema/_format.py:494: in <module>
    import isoduration
isoduration/__init__.py:3: in <module>
    from isoduration.parser import parse_duration
isoduration/parser/__init__.py:2: in <module>
    from isoduration.parser.parsing import parse_date_duration
isoduration/parser/parsing.py:4: in <module>
    import arrow  # type: ignore
arrow/__init__.py:2: in <module>
    from .api import get, now, utcnow
arrow/api.py:12: in <module>
    from arrow.arrow import TZ_EXPR, Arrow
arrow/arrow.py:32: in <module>
    from dateutil import tz as dateutil_tz
dateutil/tz/__init__.py:2: in <module>
    from .tz import *
dateutil/tz/tz.py:37: in <module>
    EPOCH = datetime.datetime.utcfromtimestamp(0)
E   DeprecationWarning: datetime.datetime.utcfromtimestamp() is deprecated and scheduled for removal in a future version.
Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.fromtimestamp(timestamp, datetime.UTC).

[braingram]

@pllim that appears to be an issue with dateutil fixed: dateutil/dateutil#1285
It's likely not seen here as nothing requires the optional isoduration dependency (which is using dateutil).

[pllim]

We don't either, but it got imported by asdf like this:

asdf/_jsonschema/_format.py:494: in <module>
    import isoduration

Weird.