fix: use generic gpt-4o model for Azure example, remove leftover shutdown

Author: richardsolomou

examples/example-ai-azure-openai/chat.py

@@ -29,7 +29,7 @@
 )
 
 response = client.chat.completions.create(
-    model="grok-4-20-non-reasoning",
+    model="gpt-4o",
     max_completion_tokens=1024,
     messages=[
         {"role": "user", "content": "Tell me a fun fact about hedgehogs."},

examples/example-ai-openai/transcription.py

@@ -30,7 +30,6 @@
 if not os.path.exists(audio_path):
     print(f"Skipping: audio file not found at '{audio_path}'")
     print("Set AUDIO_PATH to a valid audio file (mp3, wav, m4a, etc.)")
-    provider.shutdown()
     sys.exit(0)
 
 with open(audio_path, "rb") as audio_file: