remove try/catch block and associated test for EDUCATOR-1134 following…

remove try/catch block and associated test for EDUCATOR-1134 following verification that no stage or production courses have issues related to dates

common/lib/xmodule/xmodule/course_module.py

@@ -1453,13 +1453,4 @@ class CourseSummary(object):
         """
         Returns whether the course has ended.
         """
-        try:
-            return course_metadata_utils.has_course_ended(self.end)
-        except TypeError as e:
-            log.warning(
-                "Course '{course_id}' has an improperly formatted end date '{end_date}'. Error: '{err}'.".format(
-                    course_id=unicode(self.id), end_date=self.end, err=e
-                )
-            )
-            modified_end = self.end.replace(tzinfo=utc)
-            return course_metadata_utils.has_course_ended(modified_end)
+        return course_metadata_utils.has_course_ended(self.end)

common/lib/xmodule/xmodule/tests/test_course_module.py

@@ -2,7 +2,6 @@
 import ddt
 import unittest
 from datetime import datetime, timedelta
-from dateutil import parser
 
 import itertools
 from fs.memoryfs import MemoryFS
@@ -143,16 +142,6 @@ class HasEndedMayCertifyTestCase(unittest.TestCase):
         self.assertFalse(self.future_noshow_certs.may_certify())
 
 
-class CourseSummaryHasEnded(unittest.TestCase):
-    """ Test for has_ended method when end date is missing timezone information. """
-
-    def test_course_end(self):
-        test_course = get_dummy_course("2012-01-01T12:00")
-        bad_end_date = parser.parse("2012-02-21 10:28:45")
-        summary = xmodule.course_module.CourseSummary(test_course.id, end=bad_end_date)
-        self.assertTrue(summary.has_ended())
-
-
 @ddt.ddt
 class IsNewCourseTestCase(unittest.TestCase):
     """Make sure the property is_new works on courses"""