Remove TF backend (#3733)

### Changes

Removed TF backend:

Author: AlexanderDokuchaev

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -17,10 +17,10 @@ body:
         Provide python environment using command:
           Attach the `requirements.txt` file that is generated by `pip freeze > requirements.txt`
         Manually:
-          Provide the NNCF version and OpenVINO, Torch, TensorFlow, ONNX versions if applicable.
-        
+          Provide the NNCF version and OpenVINO, Torch, ONNX versions if applicable.
+
         Additionally:
-        OS                  Ubuntu 20.04.5 LTS 
+        OS                  Ubuntu 20.04.5 LTS
         Python              3.10.0
         Install             git
         RAM                 32.00 GB
@@ -33,7 +33,7 @@ body:
     attributes:
       label: Minimal Reproducible Example
       description: |
-        How can we reproduce your issue? 
+        How can we reproduce your issue?
 
         The minimal code snippet that is easy to understand and can be used to reproduce the issue is the best explanation of the issue!
       placeholder: |

.github/action_configs/labeler.yml

@@ -17,16 +17,6 @@ NNCF PT:
       - 'tests/torch/**/*!(.md)'
       - 'nncf/quantization/**/torch_backend.py'
 
-NNCF TF:
-- any:
-  - changed-files:
-    - any-glob-to-any-file:
-      - 'examples/tensorflow/**/*!(.md)'
-      - 'examples/post_training_quantization/tensorflow/**/*!(.md)'
-      - 'nncf/tensorflow/**/*!(.md)'
-      - 'tests/tensorflow/**/*!(.md)'
-      - 'nncf/quantization/**/tf_backend.py'
-
 NNCF ONNX:
 - any:
   - changed-files:

.github/dependabot.yml

@@ -30,7 +30,6 @@ updates:
       - dependency-name: "onnx"
       - dependency-name: "onnxruntime"
       - dependency-name: "openvino"
-      - dependency-name: "tensorflow"
       - dependency-name: "torch"
       - dependency-name: "torchvision"
       # Tests

.github/workflows/call_precommit_windows.yml

@@ -127,35 +127,6 @@ jobs:
         env:
           NUM_WORKERS: 1  # Parallel tests are falls on build extenstion.
 
-  tensorflow:
-    timeout-minutes: 40
-    runs-on: windows-2025-8-core
-    if: ${{ inputs.python_version != '3.12' }}
-    defaults:
-      run:
-        shell: bash
-    env:
-      DEBIAN_FRONTEND: noninteractive
-    steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
-        with:
-          lfs: true
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
-        with:
-          python-version: ${{ inputs.python_version }}
-      - name: Override constraints
-        if: ${{ inputs.override_requirements != '' }}
-        run: python .github/scripts/override_constraints.py "${{ inputs.override_requirements }}"
-        shell: bash
-      - name: Install NNCF and test requirements
-        run: pip install . -r tests/tensorflow/requirements.txt
-      - name: Print installed modules
-        run: pip list
-      - name: Run TensorFlow precommit test scope
-        run: make test-tensorflow
-        env:
-          NUM_WORKERS: 6
-
   pytorch2-cpu:
     timeout-minutes: 40
     runs-on: windows-2025-8-core

.github/workflows/install.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        backend:  ["torch", "tf", "onnx", "openvino"]
+        backend:  ["torch", "onnx", "openvino"]
         runner: ["windows-latest", "ubuntu-latest"]
     defaults:
       run:

.github/workflows/mypy.yml

@@ -24,7 +24,7 @@ jobs:
           python-version: 3.10.14
       - name: Install NNCF
         run: |
-          pip install . torch tensorflow -c constraints.txt
+          pip install . torch -c constraints.txt
       - name: Install mypy
         run: pip install mypy==1.8.0
       - name: Run mypy

.github/workflows/nightly.yml

@@ -23,29 +23,6 @@ jobs:
       - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - uses: AlexanderDokuchaev/md-dead-link-check@d5a37e0b14e5918605d22b34562532762ccb2e47 # v1.2.0
 
-  tensorflow:
-    runs-on: ubuntu-latest-8-cores
-    if: github.repository_owner == 'openvinotoolkit'
-    timeout-minutes: 100
-    defaults:
-      run:
-        shell: bash
-    env:
-      DEBIAN_FRONTEND: noninteractive
-    steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
-        with:
-          lfs: true
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
-        with:
-          python-version: 3.10.14
-      - name: Install NNCF and test requirements
-        run: pip install . -r tests/tensorflow/requirements.txt
-      - name: Print installed modules
-        run: pip list
-      - name: Run TensorFlow precommit
-        run: pytest tests/tensorflow -ra
-
   weight-compression:
     if: github.repository_owner == 'openvinotoolkit'
     uses: ./.github/workflows/conformance_weight_compression.yml

Makefile

@@ -80,34 +80,6 @@ test-examples-openvino:
 		--backend openvino                  \
 		--junitxml ${JUNITXML_PATH}
 
-###############################################################################
-# TensorFlow backend
-install-tensorflow-test:
-	pip install -U pip
-	pip install -e .
-	pip install "git+https://github.com/openvinotoolkit/open_model_zoo.git@e7df86da686d2e1600282422e54f66c2fecea160#egg=accuracy_checker&subdirectory=tools/accuracy_checker"
-	pip install -r tests/tensorflow/requirements.txt
-	pip install -r tests/cross_fw/install/requirements.txt
-	pip install -r tests/cross_fw/examples/requirements.txt
-
-install-tensorflow-dev: install-tensorflow-test install-pre-commit
-	pip install -r examples/post_training_quantization/tensorflow/mobilenet_v2/requirements.txt
-
-test-tensorflow:
-	pytest ${COVERAGE_ARGS} ${NUM_WORKERS_ARG} -ra tests/tensorflow -m "not nightly"   \
-		--junitxml ${JUNITXML_PATH}         \
-		$(DATA_ARG)
-
-test-tensorflow-nightly:
-	pytest ${COVERAGE_ARGS} tests/tensorflow -m 'nightly'  \
-		--junitxml ${JUNITXML_PATH}         \
-		$(DATA_ARG)
-
-test-install-tensorflow:
-	pytest tests/cross_fw/install -s --backend tf --junitxml ${JUNITXML_PATH}
-
-test-examples-tensorflow:
-	pytest tests/cross_fw/examples -s --backend tf --junitxml ${JUNITXML_PATH}
 
 ###############################################################################
 # PyTorch backend