Removes duplicated wording.
1. ``ZoneInfo(key)``: When constructed with the primary constructor, a
``ZoneInfo`` object is serialized by key, and when deserialized, the
deserializing process uses the primary and thus it is expected that these
- are expected to be the same object as other references to the same time
+ are the same object as other references to the same time
zone. For example, if ``europe_berlin_pkl`` is a string containing a pickle
constructed from ``ZoneInfo("Europe/Berlin")``, one would expect the
following behavior: