Disable loss scaler for now

Author: SeanNaren

pytorch_lightning/plugins/precision/fully_sharded_native_amp.py

@@ -20,17 +20,12 @@
 from pytorch_lightning.utilities import _FAIRSCALE_FULLY_SHARDED_AVAILABLE, GradClipAlgorithmType
 
 if _FAIRSCALE_FULLY_SHARDED_AVAILABLE:
-    from fairscale.experimental.optim import DynamicLossScaler
     from fairscale.nn.data_parallel import FullyShardedDataParallel
 
 
 class FullyShardedNativeMixedPrecisionPlugin(ShardedNativeMixedPrecisionPlugin):
     """Mixed Precision for Full Sharded Training"""
 
-    def __init__(self) -> None:
-        super().__init__()
-        self.scaler = DynamicLossScaler()
-
     def clip_gradients(
         self,
         optimizer: 'Optimizer',