diff --git a/decoimpact/business/entities/rules/rolling_statistics_rule.py b/decoimpact/business/entities/rules/rolling_statistics_rule.py
index dc9b2ae6..0b175d64 100644
--- a/decoimpact/business/entities/rules/rolling_statistics_rule.py
+++ b/decoimpact/business/entities/rules/rolling_statistics_rule.py
@@ -137,9 +137,6 @@ def _perform_operation(
             DataArray: Values of operation type
         """
 
-        # derived from this stackoverflow answer:
-        # https://stackoverflow.com/questions/76556088/rolling-timedelta-temporal-window-with-xarray
-
         result_array = _cp.deepcopy(values)
         result_array = result_array.where(False, _np.nan)
 
@@ -147,11 +144,6 @@ def _perform_operation(
             operation_time_delta = _dt.timedelta(hours=period)
         elif time_scale == "D":
             operation_time_delta = _dt.timedelta(days=period)
-        # elif time_scale == "M":
-        #     operation_time_delta = _dt.timedelta(months=period)
-        # elif time_scale == "Y":
-        #     operation_time_delta = _dt.timedelta(years=period)
-        # NB 'months' and 'years' are not supported this way
         else:
             logger.log_error(f"Invalid time scale provided : '{time_scale}'.")
 
diff --git a/decoimpact/business/utils/dataset_utils.py b/decoimpact/business/utils/dataset_utils.py
index 554e8312..0042acb3 100644
--- a/decoimpact/business/utils/dataset_utils.py
+++ b/decoimpact/business/utils/dataset_utils.py
@@ -283,7 +283,6 @@ def get_time_dimension_name(variable: _xr.DataArray, logger: ILogger) -> str:
         str: time dimension name
     """
     
-
     for dim in variable.dims:
         dim_values = variable[dim]
         if dim_values.dtype.name == "datetime64[ns]":
@@ -291,4 +290,4 @@ def get_time_dimension_name(variable: _xr.DataArray, logger: ILogger) -> str:
 
     message = f"No time dimension found for {variable.name}"
     logger.log_error(message)
-    raise ValueError(message)
+    raise ValueError(message)
\ No newline at end of file