fix: minor fix and unused import

src/structures/services/structures-search.service.ts

@@ -4,7 +4,6 @@ import { structureDto } from '../dto/structure.dto';
 import { StructureDocument } from '../schemas/structure.schema';
 import { StructureSearchBody } from '../interfaces/structure-search-body.interface';
 import { StructureSearchResult } from '../interfaces/structure-search-response.interface';
-import { elementAt } from 'rxjs/operators';
 
 @Injectable()
 export class StructuresSearchService {
@@ -28,7 +27,7 @@ export class StructuresSearchService {
   }
 
   public async createStructureIndex(): Promise<any> {
-    return await this.elasticsearchService.indices.create({
+    return this.elasticsearchService.indices.create({
       index: this.index,
     });
   }