private void DeleteEntities(IEnumerable <CustomisationImportRequest> requests)
        {
            var response = new CustomisationImportResponse();

            foreach (var request in requests)
            {
                var optionMetadata =
                    CustomisationImportService.ExtractOptionSetsFromExcel(request.ExcelFile.FileName, Controller, response);
                var fieldMetadata =
                    CustomisationImportService.ExtractFieldMetadataFromExcel(request.ExcelFile.FileName, Controller,
                                                                             optionMetadata, response).Values;
                var recordMetadata =
                    CustomisationImportService.ExtractRecordMetadataFromExcel(request.ExcelFile.FileName, Controller,
                                                                              fieldMetadata, response).Values;
                foreach (
                    var metadata in recordMetadata)
                {
                    if (XrmRecordService.RecordTypeExists(metadata.SchemaName))
                    {
                        XrmRecordService.DeleteRecordType(metadata.SchemaName);
                    }
                    Assert.IsFalse(XrmRecordService.RecordTypeExists(metadata.SchemaName));
                }
            }
        }