drop duplicated torchmetrics requirement from Fabric's testing

[Borda]

What does this PR do?

make the Fabric lighter

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📚 Documentation preview 📚: https://pytorch-lightning--20675.org.readthedocs.build/en/20675/

[github-actions]

⚡ Required checks status: All passing 🟢

Groups summary

🟢 pytorch_lightning: Tests workflow

Check ID	Status
pl-cpu-guardian	success	✅

These checks are required after the changes to requirements/fabric/test.txt, src/lightning/fabric/utilities/spike.py, requirements/pytorch/base.txt.

🟢 pytorch_lightning: Azure GPU

Check ID	Status
pytorch-lightning (GPUs) (testing Lightning | latest)	success	✅
pytorch-lightning (GPUs) (testing PyTorch | latest)	success	✅

These checks are required after the changes to requirements/pytorch/base.txt, requirements/fabric/test.txt, src/lightning/fabric/utilities/spike.py.

🟢 pytorch_lightning: Benchmarks

Check ID	Status
lightning.Benchmarks	success	✅

These checks are required after the changes to requirements/fabric/test.txt, requirements/pytorch/base.txt, src/lightning/fabric/utilities/spike.py.

🟢 fabric: Docs

Check ID	Status
docs-make (fabric, doctest)	success	✅
docs-make (fabric, html)	success	✅

These checks are required after the changes to src/lightning/fabric/utilities/spike.py, requirements/fabric/test.txt.

🟢 pytorch_lightning: Docs

Check ID	Status
docs-make (pytorch, doctest)	success	✅
docs-make (pytorch, html)	success	✅

These checks are required after the changes to requirements/pytorch/base.txt.

🟢 pytorch_lightning: Docker

Check ID	Status
build-cuda (3.10, 2.1.2, 12.1.1)	success	✅
build-cuda (3.11, 2.2.2, 12.1.1)	success	✅
build-cuda (3.11, 2.3.1, 12.1.1)	success	✅
build-cuda (3.11, 2.4.1, 12.1.1)	success	✅
build-cuda (3.12, 2.5.1, 12.1.1)	success	✅
build-cuda (3.12, 2.6.0, 12.4.1)	success	✅
build-pl (3.10, 2.1, 12.1.1)	success	✅
build-pl (3.11, 2.2, 12.1.1)	success	✅
build-pl (3.11, 2.3, 12.1.1)	success	✅
build-pl (3.11, 2.4, 12.1.1)	success	✅
build-pl (3.12, 2.5, 12.1.1)	success	✅
build-pl (3.12, 2.6, 12.4.1, true)	success	✅

These checks are required after the changes to requirements/pytorch/base.txt, requirements/fabric/test.txt.

🟢 lightning_fabric: CPU workflow

Check ID	Status
fabric-cpu-guardian	success	✅

These checks are required after the changes to requirements/fabric/test.txt, src/lightning/fabric/utilities/spike.py.

🟢 lightning_fabric: Azure GPU

Check ID	Status
lightning-fabric (GPUs) (testing Fabric | latest)	success	✅
lightning-fabric (GPUs) (testing Lightning | latest)	success	✅

These checks are required after the changes to requirements/fabric/test.txt, src/lightning/fabric/utilities/spike.py.

🟢 mypy

Check ID	Status
mypy	success	✅

These checks are required after the changes to requirements/fabric/test.txt, requirements/pytorch/base.txt, src/lightning/fabric/utilities/spike.py.

🟢 install

Check ID	Status
install-pkg-guardian	success	✅

These checks are required after the changes to src/lightning/fabric/utilities/spike.py, requirements/fabric/test.txt, requirements/pytorch/base.txt.

---

Thank you for your contribution! 💜

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 87%. Comparing base (df5dee6) to head (0057764).
Report is 130 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #20675   +/-   ##
=======================================
- Coverage      87%      87%   -0%     
=======================================
  Files         268      268           
  Lines       23449    23449           
=======================================
- Hits        20501    20499    -2     
- Misses       2948     2950    +2