Remove TODO on sies_step_length halflife. Should be > 0, is 2.5, ies …

…default 1.5

src/ert/run_models/iterated_ensemble_smoother.py

@@ -61,7 +61,7 @@ def __init__(
             min_steplength=analysis_config.ies_min_steplength,
             max_steplength=analysis_config.ies_max_steplength,
             halflife=analysis_config.ies_dec_steplength,
-        )  # TO-DO: verify halflife exactly corresponds to dec in old implementation
+        )
 
         # Initialize sies_smoother to None
         # It is initialized later, but kept track of here