diff --git a/src/pytorch_lightning/CHANGELOG.md b/src/pytorch_lightning/CHANGELOG.md
index 2f7f1ffca6ca3..f811f1fa7f57c 100644
--- a/src/pytorch_lightning/CHANGELOG.md
+++ b/src/pytorch_lightning/CHANGELOG.md
@@ -232,6 +232,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 - Remove the deprecated `Trainer.should_rank_save_checkpoint` ([#14885](https://github.com/Lightning-AI/lightning/pull/14885))
 
+- Removed the deprecated `TrainerDataLoadingMixin` ([#14888](https://github.com/Lightning-AI/lightning/pull/14888))
+
 
 ### Fixed
 
diff --git a/src/pytorch_lightning/trainer/data_loading.py b/src/pytorch_lightning/trainer/data_loading.py
deleted file mode 100644
index 3163e7660cb0c..0000000000000
--- a/src/pytorch_lightning/trainer/data_loading.py
+++ /dev/null
@@ -1,62 +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 abc import ABC
-from typing import Any, List, Optional, Union
-
-from torch.utils.data import DataLoader
-
-import pytorch_lightning as pl
-from pytorch_lightning.trainer.states import RunningStage
-from pytorch_lightning.utilities.rank_zero import rank_zero_deprecation
-
-
-class TrainerDataLoadingMixin(ABC):
-    r"""
-    .. deprecated:: v1.6
-        The `TrainerDataLoadingMixin` class was deprecated in v1.6 and will be removed in v1.8.
-    """
-
-    def prepare_dataloader(self, dataloader: Any, shuffle: bool, mode: Optional[RunningStage] = None) -> Any:
-        r"""
-        .. deprecated:: v1.6
-            `TrainerDataLoadingMixin.prepare_dataloader` was deprecated in v1.6
-            and will be removed in v1.8.
-
-        This function handles to following functionalities:
-
-        - Injecting a `DistributedDataSampler` into the `DataLoader` if on a distributed environment
-        - Wrapping the datasets and samplers into fault-tolerant components
-        """
-        rank_zero_deprecation(
-            "`TrainerDataLoadingMixin.prepare_dataloader` was deprecated in v1.6 and will be removed in v1.8."
-        )
-        return self._data_connector._prepare_dataloader(dataloader, shuffle, mode)
-
-    def request_dataloader(
-        self, stage: RunningStage, model: Optional["pl.LightningModule"] = None
-    ) -> Union[DataLoader, List[DataLoader]]:
-        r"""
-        .. deprecated:: v1.6
-            `TrainerDataLoadingMixin.request_dataloader` was deprecated in v1.6
-            and will be removed in v1.8.
-
-        Requests a dataloader from the given model by calling dataloader hooks corresponding to the given stage.
-
-        Returns:
-            The requested dataloader
-        """
-        rank_zero_deprecation(
-            "`TrainerDataLoadingMixin.request_dataloader` was deprecated in v1.6 and will be removed in v1.8."
-        )
-        return self._data_connector._request_dataloader(stage)
diff --git a/src/pytorch_lightning/trainer/trainer.py b/src/pytorch_lightning/trainer/trainer.py
index d286f837d85cb..c885741902343 100644
--- a/src/pytorch_lightning/trainer/trainer.py
+++ b/src/pytorch_lightning/trainer/trainer.py
@@ -75,7 +75,6 @@
 from pytorch_lightning.trainer.connectors.logger_connector import LoggerConnector
 from pytorch_lightning.trainer.connectors.logger_connector.result import _ResultCollection
 from pytorch_lightning.trainer.connectors.signal_connector import SignalConnector
-from pytorch_lightning.trainer.data_loading import TrainerDataLoadingMixin
 from pytorch_lightning.trainer.optimizers import TrainerOptimizersMixin
 from pytorch_lightning.trainer.states import RunningStage, TrainerFn, TrainerState, TrainerStatus
 from pytorch_lightning.trainer.supporters import CombinedLoader
@@ -112,7 +111,6 @@
 
 class Trainer(
     TrainerOptimizersMixin,  # TODO: Remove in v1.8
-    TrainerDataLoadingMixin,  # TODO: Remove in v1.8
 ):
     @_defaults_from_env_vars
     def __init__(
diff --git a/tests/tests_pytorch/deprecated_api/test_remove_1-8.py b/tests/tests_pytorch/deprecated_api/test_remove_1-8.py
index 862ffc7e9014d..f4061817e923e 100644
--- a/tests/tests_pytorch/deprecated_api/test_remove_1-8.py
+++ b/tests/tests_pytorch/deprecated_api/test_remove_1-8.py
@@ -22,7 +22,6 @@
 from pytorch_lightning.demos.boring_classes import BoringDataModule, BoringModel
 from pytorch_lightning.strategies.ipu import LightningIPUModule
 from pytorch_lightning.trainer.configuration_validator import _check_datamodule_checkpoint_hooks
-from pytorch_lightning.trainer.states import RunningStage
 
 
 def test_v1_8_0_on_init_start_end(tmpdir):
@@ -93,22 +92,6 @@ def test_v1_8_0_trainer_optimizers_mixin():
         trainer.convert_to_lightning_optimizers()
 
 
-def test_v1_8_0_deprecate_trainer_data_loading_mixin():
-    trainer = Trainer(max_epochs=1)
-    model = BoringModel()
-    dm = BoringDataModule()
-    trainer.fit(model, datamodule=dm)
-
-    with pytest.deprecated_call(
-        match=r"`TrainerDataLoadingMixin.prepare_dataloader` was deprecated in v1.6 and will be removed in v1.8.",
-    ):
-        trainer.prepare_dataloader(dataloader=model.train_dataloader, shuffle=False)
-    with pytest.deprecated_call(
-        match=r"`TrainerDataLoadingMixin.request_dataloader` was deprecated in v1.6 and will be removed in v1.8.",
-    ):
-        trainer.request_dataloader(stage=RunningStage.TRAINING)
-
-
 def test_v_1_8_0_deprecated_device_stats_monitor_prefix_metric_keys():
     from pytorch_lightning.callbacks.device_stats_monitor import prefix_metric_keys