no need to do anything if delete dto is empty

src/space-model/services/subspace/subspace-model.service.ts

@@ -137,7 +137,7 @@ export class SubSpaceModelService {
   ) {
     try {
       if (!deleteDtos || deleteDtos.length === 0) {
-        throw new Error('No subspaces provided for deletion.');
+        return;
       }
 
       const deleteResults = [];