back out some EWA stuff...

modules/deeplearning/icing_cnn.py

@@ -690,8 +690,6 @@ class IcingIntensityNN:
         self.optimizer.apply_gradients(zip(gradients, self.model.trainable_variables))
         if TRACK_MOVING_AVERAGE:
             self.ema.apply(self.model.trainable_variables)
-            for var in self.model.trainable_variables:
-                var.assign(self.ema.average(var))
 
         self.train_loss(loss)
         self.train_accuracy(labels, pred)