remove timezone (#40)

Author: ejoranlienea

models/staging/edfi_3/base/base_ef3__student_assessments.sql

@@ -14,8 +14,8 @@ renamed as (
         v:assessmentReference:assessmentIdentifier::string as assessment_identifier,
         v:assessmentReference:namespace::string            as namespace,
         v:schoolYearTypeReference:schoolYear::int          as school_year,
-        v:administrationDate::timestamptz                  as administration_date,
-        v:administrationEndDate::timestamptz               as administration_end_date,
+        v:administrationDate::timestamp                    as administration_date,
+        v:administrationEndDate::timestamp                 as administration_end_date,
         v:studentAssessmentIdentifier::string              as student_assessment_identifier,
         v:studentReference:studentUniqueId::string         as student_unique_id,
         v:eventDescription::string                         as event_description,
@@ -42,4 +42,4 @@ renamed as (
         v:_ext as v_ext
     from student_assessments
 )
-select * from renamed
+select * from renamed