message: API: Remove unused duplication errorCodes
diff: @@ -14,18 +14,6 @@ export const errorCodes = {
  }
  },
  duplication: {
  - courseDuplicationFailed: {
  - code: 'Course duplication failed',
  - text: 'Failed to duplicate course',
  - },
  - lectureDuplicationFailed: {
  - code: 'Lecture duplication failed',
  - text: 'Failed to duplicate lecture',
  - },
  - unitDuplicationFailed: {
  - code: 'Unit duplication failed',
  - text: 'Failed to duplicate unit',
  - },
  targetNotFound: {
  code: 'Target notfound',
  text: 'The specified duplication target could not be found',
  