diff --git a/src/pytorch_lightning/CHANGELOG.md b/src/pytorch_lightning/CHANGELOG.md
index a4c23a95c6..a9d5267614 100644
--- a/src/pytorch_lightning/CHANGELOG.md
+++ b/src/pytorch_lightning/CHANGELOG.md
@@ -67,6 +67,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
   * env_prefix
   * env_parse
 
+- Removed the deprecated code in `pl.core.mixins` ([#16424](https://github.com/Lightning-AI/lightning/pull/16424))
+
 - Removed the deprecated code in `pl.utilities.distributed` ([#16390](https://github.com/Lightning-AI/lightning/pull/16390))
 
 - Removed the deprecated code in `pl.utilities.apply_func` ([#16413](https://github.com/Lightning-AI/lightning/pull/16413))
diff --git a/src/pytorch_lightning/core/mixins/__init__.py b/src/pytorch_lightning/core/mixins/__init__.py
index 1f19bd6e71..cc2573d6fd 100644
--- a/src/pytorch_lightning/core/mixins/__init__.py
+++ b/src/pytorch_lightning/core/mixins/__init__.py
@@ -11,6 +11,4 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-from lightning_fabric.utilities.device_dtype_mixin import _DeviceDtypeModuleMixin  # noqa: F401
 from pytorch_lightning.core.mixins.hparams_mixin import HyperparametersMixin  # noqa: F401
diff --git a/src/pytorch_lightning/core/mixins/device_dtype_mixin.py b/src/pytorch_lightning/core/mixins/device_dtype_mixin.py
deleted file mode 100644
index e6e8a489e8..0000000000
--- a/src/pytorch_lightning/core/mixins/device_dtype_mixin.py
+++ /dev/null
@@ -1,25 +0,0 @@
-# Copyright The PyTorch Lightning team.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from lightning_fabric.utilities.device_dtype_mixin import _DeviceDtypeModuleMixin
-from pytorch_lightning.utilities import rank_zero_deprecation
-
-
-class DeviceDtypeModuleMixin(_DeviceDtypeModuleMixin):
-    def __init__(self) -> None:
-        rank_zero_deprecation(
-            "`pytorch_lightning.core.mixins.DeviceDtypeModuleMixin` has been deprecated in v1.8.0 and will be"
-            " removed in v2.0.0. This class is internal but you can copy over its implementation."
-        )
-        super().__init__()
diff --git a/tests/tests_pytorch/deprecated_api/test_remove_2-0.py b/tests/tests_pytorch/deprecated_api/test_remove_2-0.py
index 3a7dc20a43..ee96160aba 100644
--- a/tests/tests_pytorch/deprecated_api/test_remove_2-0.py
+++ b/tests/tests_pytorch/deprecated_api/test_remove_2-0.py
@@ -17,7 +17,6 @@ import torch
 from torch.utils.data import DataLoader
 
 from pytorch_lightning.accelerators.cpu import CPUAccelerator
-from pytorch_lightning.core.mixins.device_dtype_mixin import DeviceDtypeModuleMixin
 from pytorch_lightning.demos.boring_classes import RandomDataset
 from pytorch_lightning.strategies.utils import on_colab_kaggle
 from pytorch_lightning.utilities.cloud_io import atomic_save, get_filesystem, load
@@ -31,14 +30,6 @@ def test_v1_10_deprecated_on_colab_kaggle_func():
         on_colab_kaggle()
 
 
-def test_v1_10_deprecated_device_dtype_module_mixin():
-    class MyModule(DeviceDtypeModuleMixin):
-        pass
-
-    with pytest.deprecated_call(match="mixins.DeviceDtypeModuleMixin` has been deprecated in v1.8.0"):
-        MyModule()
-
-
 def test_v1_10_deprecated_cloud_io_utilities(tmpdir):
     with pytest.deprecated_call(match="cloud_io.atomic_save` has been deprecated in v1.8.0"):
         atomic_save({}, tmpdir / "atomic_save.ckpt")