feat: remove excess deprecated model warnings from TTS functions

Author: twangodev

src/fishaudio/resources/tts.py

@@ -206,8 +206,6 @@ def convert(
             save(audio, "output.mp3")
             ```
         """
-        warn_if_deprecated_model(model)
-
         return self.stream(
             text=text,
             reference_id=reference_id,
@@ -513,8 +511,6 @@ async def convert(
             save(audio, "output.mp3")
             ```
         """
-        warn_if_deprecated_model(model)
-
         stream = await self.stream(
             text=text,
             reference_id=reference_id,