Merge branch 'ref/precision_plugins' of github.com:PyTorchLightning/p…

…ytorch-lightning into ref/precision_plugins

pytorch_lightning/plugins/base_plugin.py

@@ -29,7 +29,6 @@ def connect(self, model: torch.nn.Module, *args: Sequence, **kwargs: Sequence) -
 
     def pre_optimizer_step(self, optimizer: torch.optim.Optimizer, optimizer_idx: int) -> None:
         """Hook to do something before each optimizer step."""
-        pass
 
     def post_optimizer_step(self, optimizer: torch.optim.Optimizer, optimizer_idx: int) -> None:
         """Hook to do something after each optimizer step."""