fix: Remove incorrect comment on enhanced models (#95)

Fixes http://b/140560084

Author: vinnysenthil

speech/snippets/transcribe_enhanced_model.py

@@ -42,8 +42,6 @@ def transcribe_file_with_enhanced_model(path):
         encoding=speech.RecognitionConfig.AudioEncoding.LINEAR16,
         sample_rate_hertz=8000,
         language_code="en-US",
-        # Enhanced models are only available to projects that
-        # opt in for audio data collection.
         use_enhanced=True,
         # A model must be specified to use enhanced model.
         model="phone_call",