feat(translations): remove BE component translation keys

Author: adi-herwana-nus

config/locales/en/components.yml

@@ -3,9 +3,6 @@ en:
     assessment:
       assessments:
         invalid_questions_order: 'Invalid ordering for assessment questions'
-        sidebar_title: :'course.assessment.assessments.index.header'
-        index:
-          header: 'Assessments'
         show:
           public_test: 'Public'
           private_test: 'Private'

config/locales/en/course/achievement/achievements.yml

@@ -1,8 +1,6 @@
 en:
   course:
     experience_points_records:
-      index:
-        header: 'Experience Points History for %{name}'
       download:
         name: 'Name'
         updated_at: 'Updated At'