Prune deprecated hparams setter

CHANGELOG.md

@@ -43,6 +43,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Removed `mode='auto'` from `EarlyStopping` ([#6167](https://github.com/PyTorchLightning/pytorch-lightning/pull/6167))
 
 
+- Removed deprecated `LightningModule` `hparams` setter ([#6207](https://github.com/PyTorchLightning/pytorch-lightning/pull/6207))
+
+
 ### Fixed
 
 - Made the `Plugin.reduce` method more consistent across all Plugins to reflect a mean-reduction by default ([#6011](https://github.com/PyTorchLightning/pytorch-lightning/pull/6011))

pytorch_lightning/core/lightning.py

@@ -1806,21 +1806,6 @@ def hparams_initial(self) -> AttributeDict:
  # prevent any change
  return copy.deepcopy(self._hparams_initial)
 
- @hparams.setter
- def hparams(self, hp: Union[dict, Namespace, Any]):
- # TODO: remove this method in v1.3.0.
- rank_zero_warn(
- "The setter for self.hparams in LightningModule is deprecated since v1.1.0 and will be"
- " removed in v1.3.0. Replace the assignment `self.hparams = hparams` with "
- " `self.save_hyperparameters()`.", DeprecationWarning
- )
- hparams_assignment_name = self.__get_hparams_assignment_variable()
- self._hparams_name = hparams_assignment_name
- self._set_hparams(hp)
- # this resolves case when user does not uses `save_hyperparameters` and do hard assignement in init
- if not hasattr(self, "_hparams_initial"):
- self._hparams_initial = copy.deepcopy(self._hparams)
-
  def __get_hparams_assignment_variable(self):
  """
  looks at the code of the class to figure out what the user named self.hparams