Add clear method to the annotation repository

frontend/repositories/tasks/text-classification/api.ts

@@ -25,4 +25,9 @@ export class FromApiTextClassificationRepository implements TextClassificationRe
     const url = `/projects/${projectId}/docs/${docId}/annotations/${annotationId}`
     await this.request.delete(url)
   }
+
+  public async clear(projectId: string, docId: number): Promise<void> {
+    const url = `/projects/${projectId}/docs/${docId}/annotations`
+    await this.request.delete(url)
+  }
 }

frontend/repositories/tasks/text-classification/interface.ts

@@ -6,4 +6,6 @@ export interface TextClassificationRepository {
   create(projectId: string, docId: number, labelId: number): Promise<void>
 
   delete(projectId: string, docId: number, annotationId: number): Promise<void>
+
+  clear(projectId: string, docId: number): Promise<void>
 }