samples: Data logging opt-in is no longer required for enhanced models (#1360)

Author: Rebecca Taylor

speech/snippets/src/main/java/com/example/speech/Recognize.java

@@ -735,8 +735,6 @@ public static void transcribeFileWithEnhancedModel(String fileName) throws Excep
               .setEncoding(AudioEncoding.LINEAR16)
               .setLanguageCode("en-US")
               .setSampleRateHertz(8000)
-              // Enhanced models are only available to projects that
-              // opt in for audio data collection.
               .setUseEnhanced(true)
               // A model must be specified to use enhanced model.
               .setModel("phone_call")