diff --git a/apps/server/src/modules/board/controller/board-submission.controller.ts b/apps/server/src/modules/board/controller/board-submission.controller.ts
index ad852ed5cfb..4e81d342849 100644
--- a/apps/server/src/modules/board/controller/board-submission.controller.ts
+++ b/apps/server/src/modules/board/controller/board-submission.controller.ts
@@ -8,7 +8,6 @@ import {
 	Param,
 	Patch,
 	Post,
-	UnprocessableEntityException,
 } from '@nestjs/common';
 import { ApiExtraModels, ApiOperation, ApiResponse, ApiTags, getSchemaPath } from '@nestjs/swagger';
 import { ApiValidationError } from '@shared/common';
@@ -20,8 +19,6 @@ import { SubmissionItemUc } from '../uc/submission-item.uc';
 import {
 	CreateContentElementBodyParams,
 	FileElementResponse,
-	isFileElementResponse,
-	isRichTextElementResponse,
 	RichTextElementResponse,
 	SubmissionContainerUrlParams,
 	SubmissionItemUrlParams,
diff --git a/apps/server/src/modules/board/controller/mapper/content-element-response.factory.ts b/apps/server/src/modules/board/controller/mapper/content-element-response.factory.ts
index 286d1b4d5c2..8431b630be9 100644
--- a/apps/server/src/modules/board/controller/mapper/content-element-response.factory.ts
+++ b/apps/server/src/modules/board/controller/mapper/content-element-response.factory.ts
@@ -1,5 +1,5 @@
 import { NotImplementedException, UnprocessableEntityException } from '@nestjs/common';
-import { AnyBoardDo, FileElement, isSubmissionItemContent, RichTextElement } from '@shared/domain';
+import { AnyBoardDo, FileElement, RichTextElement } from '@shared/domain';
 import {
 	AnyContentElementResponse,
 	FileElementResponse,
diff --git a/apps/server/src/modules/board/controller/mapper/submission-item-response.mapper.ts b/apps/server/src/modules/board/controller/mapper/submission-item-response.mapper.ts
index 70023b36020..6cbf0348109 100644
--- a/apps/server/src/modules/board/controller/mapper/submission-item-response.mapper.ts
+++ b/apps/server/src/modules/board/controller/mapper/submission-item-response.mapper.ts
@@ -1,15 +1,4 @@
-import {
-	FileElement,
-	isFileElement,
-	isRichTextElement,
-	isSubmissionItemContent,
-	RichTextElement,
-	SubmissionItem,
-	UserBoardRoles,
-} from '@shared/domain';
-import { UnprocessableEntityException } from '@nestjs/common';
-import { FileElementResponseMapper } from './file-element-response.mapper';
-import { RichTextElementResponseMapper } from './rich-text-element-response.mapper';
+import { FileElement, isSubmissionItemContent, RichTextElement, SubmissionItem, UserBoardRoles } from '@shared/domain';
 import { SubmissionItemResponse, SubmissionsResponse, TimestampsResponse, UserDataResponse } from '../dto';
 import { ContentElementResponseFactory } from './content-element-response.factory';