fixing import

Author: benja263

gbrl/ac_gbrl.py

@@ -11,7 +11,7 @@
 import numpy as np
 import torch as th
 
-from gbrl.gbrl_wrapper import GBTWrapper, SeparateActorCriticWrapper, SharedActorCriticWrapper, 
+from gbrl.gbrl_wrapper import GBTWrapper, SeparateActorCriticWrapper, SharedActorCriticWrapper
 from gbrl.gbt import GBRL
 from gbrl.utils import (setup_optimizer, clip_grad_norm, numerical_dtype, 
                     concatenate_arrays, validate_array, constant_like,