Merge pull request #2522 from Unity-Technologies/develop-cleanupconfig

Clean up SAC config

config/sac_trainer_config.yaml

     init_entcoef: 0.05
     train_interval: 1
 
-VisualBananaLearning:
-    beta: 1.0e-2
-    gamma: 0.99
-    num_epoch: 1
-    max_steps: 5.0e5
-    summary_freq: 1000
-
 BouncerLearning:
     normalize: true
     beta: 0.0