Remove the Meridian model from OptimizationResults.

PiperOrigin-RevId: 885714118

Author: viktoriias

meridian/analysis/optimizer.py

@@ -471,8 +471,6 @@ class OptimizationResults:
   mROI, incremental outcome, CPIK, and effectiveness.
 
   Attributes:
-    meridian: The fitted Meridian model that was used to create this budget
-      allocation.
     analyzer: The analyzer bound to the model above.
     spend_ratio: The spend ratio used to scale the non-optimized performance
       metrics to the optimized performance metrics.
@@ -490,8 +488,7 @@ class OptimizationResults:
       budget allocation.
   """
 
-  meridian: model.Meridian
-  # The analyzer bound to the model above.
+  # The analyzer bound to the model.
   analyzer: analyzer_module.Analyzer
   spend_ratio: np.ndarray  # spend / historical spend
   spend_bounds: tuple[np.ndarray, np.ndarray]
@@ -1747,7 +1744,6 @@ def optimize(
 
     return OptimizationResults(
         new_data=new_data,
-        meridian=self._meridian,
         analyzer=self._analyzer,
         spend_ratio=spend_ratio,
         spend_bounds=spend_bounds,

meridian/analysis/optimizer_test.py

@@ -3267,7 +3267,6 @@ def setUp(self):
     self.sample_optimized_data = _get_sample_optimized_data(is_revenue_kpi=True)
 
     self.optimization_results = optimizer.OptimizationResults(
-        meridian=self.budget_optimizer._meridian,
         analyzer=self.budget_optimizer._analyzer,
         spend_ratio=np.array([1.0, 1.0, 1.0]),
         spend_bounds=(
@@ -4045,7 +4044,6 @@ def setUp(self):
     )
 
     self.optimization_results = optimizer.OptimizationResults(
-        meridian=self.budget_optimizer._meridian,
         analyzer=self.budget_optimizer._analyzer,
         spend_ratio=np.array([1.0, 1.0, 1.0]),
         spend_bounds=(np.array([0.7]), np.array([1.3])),
@@ -4055,7 +4053,6 @@ def setUp(self):
         _optimization_grid=self.optimization_grid,
     )
     self.optimization_results_kpi_output = optimizer.OptimizationResults(
-        meridian=self.budget_optimizer_kpi_output._meridian,
         analyzer=self.budget_optimizer_kpi_output._analyzer,
         spend_ratio=np.array([1.0, 1.0, 1.0]),
         spend_bounds=(np.array([0.7]), np.array([1.3])),