Remove dynamic_loss_scale argument to define_performance.

All models which support loss scaling support dynamic loss scaling, so the argument has no purpose. It used to be that some models scaled the loss manually instead of using a LossScaleOptimizer, and so did not support dynamic loss scaling.

PiperOrigin-RevId: 367719521

official/benchmark/models/resnet_cifar_main.py

@@ -267,7 +267,7 @@ def run(flags_obj):
 
 
 def define_cifar_flags():
-  common.define_keras_flags(dynamic_loss_scale=False)
+  common.define_keras_flags()
 
   flags_core.set_defaults(data_dir='/tmp/cifar10_data/cifar-10-batches-bin',
                           model_dir='/tmp/cifar10_model',