Remove deprecated functions from accelerator.py (#9019)

Author: four4fish

CHANGELOG.md

@@ -157,6 +157,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Removed deprecated `GradInformation` module in favor of `pytorch_lightning.utilities.grads` ([#8831](https://github.com/PyTorchLightning/pytorch-lightning/pull/8831/))
 
 
+- Removed deprecated `connect_precision_plugin` and `connect_training_type_plugin` from `Accelerator` ([#9019](https://github.com/PyTorchLightning/pytorch-lightning/pull/9019))
+
+
 ### Fixed
 
 - Ensure the existence of `DDPPlugin._sync_dir` in `reconciliate_processes` ([#8939](https://github.com/PyTorchLightning/pytorch-lightning/pull/8939))

pytorch_lightning/accelerators/accelerator.py

@@ -25,7 +25,7 @@
 from pytorch_lightning.plugins.precision import ApexMixedPrecisionPlugin, NativeMixedPrecisionPlugin, PrecisionPlugin
 from pytorch_lightning.plugins.training_type import TrainingTypePlugin
 from pytorch_lightning.trainer.states import TrainerFn
-from pytorch_lightning.utilities import _NATIVE_AMP_AVAILABLE, rank_zero_warn
+from pytorch_lightning.utilities import _NATIVE_AMP_AVAILABLE
 from pytorch_lightning.utilities.apply_func import apply_to_collection, move_data_to_device
 from pytorch_lightning.utilities.enums import AMPType, GradClipAlgorithmType, LightningEnum
 from pytorch_lightning.utilities.types import STEP_OUTPUT
@@ -429,32 +429,6 @@ def model_sharded_context(self) -> Generator[None, None, None]:
         with self.training_type_plugin.model_sharded_context():
             yield
 
-    # todo: remove in v1.5
-    def connect_training_type_plugin(self, plugin: TrainingTypePlugin, model: "pl.LightningModule") -> None:
-        """
-        Attaches the training type plugin to the accelerator.
-        Also transfers ownership of the model to this plugin
-
-        .. deprecated::v1.3
-            Will be removed in v1.5.0.
-        """
-        rank_zero_warn(
-            "Accelerator method `connect_training_type_plugin` was deprecated in v1.3. It will be removed in v1.5."
-        )
-        self.setup_training_type_plugin()
-
-    # todo: remove in v1.5
-    def connect_precision_plugin(self, plugin: PrecisionPlugin) -> None:
-        """Attaches the precision plugin to the accelerator
-
-        .. deprecated::v1.3
-            Will be removed in v1.5.0.
-        """
-        rank_zero_warn(
-            "Accelerator method `connect_precision_plugin` was deprecated in v1.3. It will be removed in v1.5."
-        )
-        self.setup_precision_plugin()
-
     def save_checkpoint(self, checkpoint: Dict[str, Any], filepath: str) -> None:
         """Save model/training states as a checkpoint file through state-dump and file-write.