performance report: no error on portfolios without reports

Do not generate an error on bundles that have a portfolio without cashflow in
this time period.

Fixes #179

Author: HenkKalkwater

poms/reports/performance_report.py

@@ -1010,7 +1010,6 @@ def build_modified_dietz(self, date_from, date_to):  # noqa: PLR0915
 
         if date_to > date_from:
             no_first_date = []
-            no_register_records = []
             for register in portfolio_registers:
                 portfolio = register.portfolio
                 first_transaction_date = portfolio.first_transaction_date
@@ -1029,10 +1028,6 @@ def build_modified_dietz(self, date_from, date_to):  # noqa: PLR0915
                     ],
                 ).order_by("transaction_date")
 
-                if not portfolio_records:
-                    no_register_records.append(portfolio.user_code)
-                    continue
-
                 portfolio_records = portfolio_records.filter(
                     transaction_date__gte=max(
                         date_from, first_transaction_date
@@ -1125,15 +1120,6 @@ def build_modified_dietz(self, date_from, date_to):  # noqa: PLR0915
             #         ),
             #     )
 
-            if no_register_records:
-                raise FinmarsBaseException(
-                    error_key="no_portfolio_register_records",
-                    message=(
-                        f"No portfolio register records found for the following portfolios "
-                        f"for the specified period: {', '.join(no_register_records)}"
-                    ),
-                )
-
             try:
                 cf_adjusted_total_nav = total_nav + grand_cash_flow
                 wcf_adjusted_total_nav = total_nav + grand_cash_flow_weighted