remove unnecessary cast to 'IEnumerable<ISubmodel>'.

Author: mm-kgi

source/AAS.TwinEngine.DataEngine/ApplicationLogic/Services/SubmodelRepository/SubmodelRepositoryService.cs

@@ -130,9 +130,7 @@ private async Task<List<ISubmodel>> BuildSubmodelsAsync(IEnumerable<string> subm
             return submodel;
         });
 
-        return [.. (await Task.WhenAll(tasks).ConfigureAwait(false))
-            .Where(submodel => submodel is not null)
-            .Cast<ISubmodel>()];
+        return [.. (await Task.WhenAll(tasks).ConfigureAwait(false)).Where(submodel => submodel is not null)];
     }
 
     private async Task<ISubmodel> BuildSubmodelWithValuesAsync(ISubmodel template, string submodelId, CancellationToken cancellationToken)