remove example to allow for cleaner pr

Author: ooctipus

source/isaaclab_tasks/isaaclab_tasks/manager_based/manipulation/dexsuite/config/kuka_allegro/agents/rl_games_ppo_cfg.yaml

@@ -84,28 +84,3 @@ params:
     clip_actions: False
     seq_len: 4
     bounds_loss_coef: 0.0001
-
-pbt:
-  enabled: False
-  policy_idx: 0  # policy index in a population
-  num_policies: 8  # total number of policies in the population
-  directory: .
-  workspace: "pbt_workspace"  # suffix of the workspace dir name inside train_dir
-  objective: Curriculum/adr
-
-  # PBT hyperparams
-  interval_steps: 50000000
-  threshold_std: 0.1
-  threshold_abs: 0.025
-  mutation_rate: 0.25
-  change_range: [1.1, 2.0]
-  mutation:
-
-    agent.params.config.learning_rate: "mutate_float"
-    agent.params.config.grad_norm: "mutate_float"
-    agent.params.config.entropy_coef: "mutate_float"
-    agent.params.config.critic_coef: "mutate_float"
-    agent.params.config.bounds_loss_coef: "mutate_float"
-    agent.params.config.kl_threshold: "mutate_float"
-    agent.params.config.gamma: "mutate_discount"
-    agent.params.config.tau: "mutate_discount"