Closes #19889: Drop support for Python 3.10 & 3.11

netbox/utilities/datetime.py

@@ -20,9 +20,4 @@ def datetime_from_timestamp(value):
     """
     Convert an ISO 8601 or RFC 3339 timestamp to a datetime object.
     """
-    # Work around UTC issue for Python < 3.11; see
-    # https://docs.python.org/3/library/datetime.html#datetime.datetime.fromisoformat
-    # TODO: Remove this once Python 3.10 is no longer supported
-    if type(value) is str and value.endswith('Z'):
-        value = f'{value[:-1]}+00:00'
     return datetime.datetime.fromisoformat(value)