Revert "Update apscheduler==3.8.1"

This reverts commit 973cad264f.

lib/pytz_deprecation_shim/helpers.py

@@ -1,90 +0,0 @@
-"""
-This module contains helper functions to ease the transition from ``pytz`` to
-another :pep:`495`-compatible library.
-"""
-from . import _common, _compat
-from ._impl import _PytzShimTimezone
-
-_PYTZ_BASE_CLASSES = None
-
-
-def is_pytz_zone(tz):
-    """Check if a time zone is a ``pytz`` time zone.
-
-    This will only import ``pytz`` if it has already been imported, and does
-    not rely on the existence of the ``localize`` or ``normalize`` methods
-    (since the shim classes also have these methods, but are not ``pytz``
-    zones).
-    """
-
-    # If pytz is not in sys.modules, then we will assume the time zone is not a
-    # pytz zone. It is possible that someone has manipulated sys.modules to
-    # remove pytz, but that's the kind of thing that causes all kinds of other
-    # problems anyway, so we'll call that an unsupported configuration.
-    if not _common.pytz_imported():
-        return False
-
-    if _PYTZ_BASE_CLASSES is None:
-        _populate_pytz_base_classes()
-
-    return isinstance(tz, _PYTZ_BASE_CLASSES)
-
-
-def upgrade_tzinfo(tz):
-    """Convert a ``pytz`` or shim timezone into its modern equivalent.
-
-    The shim classes are thin wrappers around :mod:`zoneinfo` or
-    :mod:`dateutil.tz` implementations of the :class:`datetime.tzinfo` base
-    class. This function removes the shim and returns the underlying "upgraded"
-    time zone.
-
-    When passed a ``pytz`` zone (not a shim), this returns the non-``pytz``
-    equivalent. This may fail if ``pytz`` is using a data source incompatible
-    with the upgraded provider's data source, or if the ``pytz`` zone was built
-    from a file rather than an IANA key.
-
-    When passed an object that is not a shim or a ``pytz`` zone, this returns
-    the original object.
-
-    :param tz:
-        A :class:`datetime.tzinfo` object.
-
-    :raises KeyError:
-        If a ``pytz`` zone is passed to the function with no equivalent in the
-        :pep:`495`-compatible library's version of the Olson database.
-
-    :return:
-        A :pep:`495`-compatible equivalent of any ``pytz`` or shim
-        class, or the original object.
-    """
-    if isinstance(tz, _PytzShimTimezone):
-        return tz._zone
-
-    if is_pytz_zone(tz):
-        if tz.zone is None:
-            # This is a fixed offset zone
-            offset = tz.utcoffset(None)
-            offset_minutes = offset.total_seconds() / 60
-
-            return _compat.get_fixed_offset_zone(offset_minutes)
-
-        if tz.zone == "UTC":
-            return _compat.UTC
-
-        return _compat.get_timezone(tz.zone)
-
-    return tz
-
-
-def _populate_pytz_base_classes():
-    import pytz
-    from pytz.tzinfo import BaseTzInfo
-
-    base_classes = (BaseTzInfo, pytz._FixedOffset)
-
-    # In releases prior to 2018.4, pytz.UTC was not a subclass of BaseTzInfo
-    if not isinstance(pytz.UTC, BaseTzInfo):  # pragma: nocover
-        base_classes = base_classes + (type(pytz.UTC),)
-
-    global _PYTZ_BASE_CLASSES
-    _PYTZ_BASE_CLASSES = base_classes