docs: Update docstring for 3 model uploading methods

PiperOrigin-RevId: 518709098

Author: vertex-sdk-bot

google/cloud/aiplatform/models.py

@@ -3982,8 +3982,6 @@ def upload_xgboost_model_file(
         """Uploads a model and returns a Model representing the uploaded Model
         resource.
 
-        Note: This function is *experimental* and can be changed in the future.
-
         Example usage:
             my_model = Model.upload_xgboost_model_file(
                 model_file_path="iris.xgboost_model.bst"
@@ -4224,8 +4222,6 @@ def upload_scikit_learn_model_file(
         """Uploads a model and returns a Model representing the uploaded Model
         resource.
 
-        Note: This function is *experimental* and can be changed in the future.
-
         Example usage:
             my_model = Model.upload_scikit_learn_model_file(
                 model_file_path="iris.sklearn_model.joblib"
@@ -4471,8 +4467,6 @@ def upload_tensorflow_saved_model(
         """Uploads a model and returns a Model representing the uploaded Model
         resource.
 
-        Note: This function is *experimental* and can be changed in the future.
-
         Example usage:
             my_model = Model.upload_scikit_learn_model_file(
                 model_file_path="iris.tensorflow_model.SavedModel"