fix: delete saving states

Parallel use of the same Api Service instance is likely to replace requestData

src/api/v1/discipline.service.ts

@@ -8,10 +8,11 @@ export class DisciplineService extends ApiService {
   public readonly version = AvailableVersion.v1;
 
   public getDisciplines(page: number | null = null, pageSize: number | null = null) {
-    return this.createRequestBuilder()
+    let request = this.createRequestBuilder()
       .setQueryParams({page: page, pageSize: pageSize})
-      .build<ApiService>()
-      .get<DisciplineResponse[]>();
+      .build;
+
+    return this.get<DisciplineResponse[]>(request);
   }
 
   public getById(id: number) {