fix(nlc): move deprecation warning

move deprecation warning to within initalizer block

ibm_watson/natural_language_classifier_v1.py

@@ -45,6 +45,15 @@ class NaturalLanguageClassifierV1(BaseService):
     DEFAULT_SERVICE_URL = 'https://api.us-south.natural-language-classifier.watson.cloud.ibm.com'
     DEFAULT_SERVICE_NAME = 'natural_language_classifier'
 
+    print(
+            """
+            On 9 August 2021, IBM announced the deprecation of the Natural Language Classifier service.
+            The service will no longer be available from 8 August 2022. As of 9 September 2021, you will not be able to create new instances. 
+            Existing instances will be supported until 8 August 2022. Any instance that still exists on that date will be deleted.
+            For more information, see https://cloud.ibm.com/docs/natural-language-classifier?topic=natural-language-classifier-migrating
+            """
+        )
+
     def __init__(
         self,
         authenticator: Authenticator = None,
@@ -84,15 +93,6 @@ def classify(self, classifier_id: str, text: str,
         :rtype: DetailedResponse with `dict` result representing a `Classification` object
         """
 
-        print(
-            """
-            On 9 August 2021, IBM announced the deprecation of the Natural Language Classifier service.
-            The service will no longer be available from 8 August 2022. As of 9 September 2021, you will not be able to create new instances. 
-            Existing instances will be supported until 8 August 2022. Any instance that still exists on that date will be deleted.
-            For more information, see https://cloud.ibm.com/docs/natural-language-classifier?topic=natural-language-classifier-migrating
-            """
-        )
-
         if classifier_id is None:
             raise ValueError('classifier_id must be provided')
         if text is None: