[client] remove deprecated API from examples (now in tests)

Author: labo-flg

examples/promote_observable_to_indicator.py

@@ -9,20 +9,10 @@
 # OpenCTI initialization
 opencti_api_client = OpenCTIApiClient(api_url, api_token)
 
-# DEPRECATED >=6.2 & <6.5. Use `promote_to_indicator_v2` instead
-obs1 = opencti_api_client.stix_cyber_observable.create(
-    simple_observable_key="IPv4-Addr.value", simple_observable_value="55.55.55.55"
-)
-observable = opencti_api_client.stix_cyber_observable.promote_to_indicator(
-    id=obs1.get("id")
-)
-print("promoted observable, original observable is", observable)
-
-# Please use promote_to_indicator_v2
-obs2 = opencti_api_client.stix_cyber_observable.create(
+obs = opencti_api_client.stix_cyber_observable.create(
     simple_observable_key="IPv4-Addr.value", simple_observable_value="55.55.55.99"
 )
 indicator = opencti_api_client.stix_cyber_observable.promote_to_indicator_v2(
-    id=obs2.get("id")
+    id=obs.get("id")
 )
-print("promoted observable, indicator is", indicator)
+print("promoted observable, new indicator is", indicator)