Gradient boosting - Remove unused translations

Author: PrimozGodec

i18n/si.jaml

@@ -9596,11 +9596,6 @@ widgets/model/owcurvefit.py:
     housing: false
 widgets/model/owgradientboosting.py:
     class `LearnerItemModel`:
-        Extreme Gradient Boosting (xgboost): true
-        xgboost: false
-        Extreme Gradient Boosting Random Forest (xgboost): true
-        Gradient Boosting (catboost): true
-        catboost: false
         def `_add_data`:
             {name}: false
             {lib} is not installed: {lib} ni nameščen