DOCSP-18309: Remove array restriction on time series

Author: npentrel

source/core/timeseries-collections.txt

@@ -109,8 +109,7 @@ When creating a time series collection, specify the following options:
       metadata should rarely, if ever, change.
 
       The name of the specified field may not be ``_id`` or the same as
-      the ``timeseries.timeField``. The field can be of any type except
-      array.
+      the ``timeseries.timeField``. The field can be of any type.
 
   * - ``timeseries.granularity``