fix: remove specifying env-vars when creating model from model package (#3301)

Co-authored-by: Basil Beirouti <[email protected]>

Author: rahven14

src/sagemaker/model.py

@@ -1581,9 +1581,6 @@ def _create_sagemaker_model(self, *args, **kwargs):  # pylint: disable=unused-ar
 
         container_def = {"ModelPackageName": model_package_name}
 
-        if self.env != {}:
-            container_def["Environment"] = self.env
-
         self._ensure_base_name_if_needed(model_package_name.split("/")[-1])
         self._set_model_name_if_needed()