commented unused preprocessing code

app.py

@@ -34,8 +34,8 @@ def greet(name):
     # # add noise to audio to simulate environment
     # noise = np.random.normal(0, noise_power ** 0.5, wave.shape)  # generate noise
     # wave = (wave + noise) * 32768.0     # add noise to the audio signal
-    tensor_wave = tf.convert_to_tensor(wave, dtype=tf.float32)  # convert to tensor
-    min_wave = min(wave)  
+    # tensor_wave = tf.convert_to_tensor(wave, dtype=tf.float32)  # convert to tensor
+    # min_wave = min(wave)  
     if len(wave) > 16000:
         sequence_stride = 16000
     else: