message: API: Remove old DuplicationController docs
diff: @@ -47,8 +47,6 @@ export class DuplicationController {
  * {
  * "_id": "5ab19c382ac32e46dcaa1574"
  * }
  - *
  - * @apiError InternalServerError Failed to duplicate course
  */
  @Post('/course/:id')
  async duplicateCourse(@Param('id') id: string,
  @@ -83,8 +81,6 @@ export class DuplicationController {
  * {
  * "_id": "5ab1a218dab93c34f8541e25"
  * }
  - *
  - * @apiError InternalServerError Failed to duplicate lecture
  */
  @Post('/lecture/:id')
  async duplicateLecture(@Param('id') id: string,
  @@ -119,8 +115,6 @@ export class DuplicationController {
  * {
  * "_id": "5ab1a380f5bbeb423070d787"
  * }
  - *
  - * @apiError InternalServerError Failed to duplicate unit
  */
  @Post('/unit/:id')
  async duplicateUnit(@Param('id') id: string,
  