Deprecate end_of_course_survey_url until it can be removed.

common/lib/xmodule/xmodule/course_module.py

@@ -280,7 +280,8 @@ class CourseFields(object):
     end_of_course_survey_url = String(
         display_name=_("Course Survey URL"),
         help=_("Enter the URL for the end-of-course survey. If your course does not have a survey, enter null."),
-        scope=Scope.settings
+        scope=Scope.settings,
+        deprecated=True  # We wish to remove this entirely, TNL-3399
     )
     discussion_blackouts = List(
         display_name=_("Discussion Blackout Dates"),

common/test/acceptance/pages/studio/settings_advanced.py

@@ -184,7 +184,6 @@ class AdvancedSettingsPage(CoursePage):
             'no_grade',
             'display_coursenumber',
             'display_organization',
-            'end_of_course_survey_url',
             'catalog_visibility',
             'chrome',
             'days_early_for_beta',