netgen: remove unused patch

[qbisi]

upstream does not respond to pull request NGSolve/netgen#197 for months
hence we vendor the patch and backport it to 25.05

Things done

• Built on platform:
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• Tested, as applicable:
  • NixOS tests in nixos/tests.
  • Package tests at passthru.tests.
  • Tests in lib/tests or pkgs/test for functions and "core" functionality.
• Ran nixpkgs-review on this PR. See nixpkgs-review usage.
• Tested basic functionality of all binary files, usually in ./result/bin/.
• Nixpkgs Release Notes
  • Package update: when the change is major or breaking.
• NixOS Release Notes
  • Module addition: when adding a new NixOS module.
  • Module update: when the change is significant.
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other READMEs.

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[Sigmanificient]

nixpkgs-review result

Generated using nixpkgs-review-gha

Command: nixpkgs-review pr 449532
Commit: 654cf8a81159d550ab5cd15d325c62a0c0d8e31f (subsequent changes)
Merge: fde9cdd57d4c5952a99bd9e39ee86b6f5644a9fa

Logs: https://github.com/Sigmanificient/nixpkgs-review-gha/actions/runs/18323142167

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x86_64-linux

✅ 2 packages built:

• netgen (python313Packages.netgen-mesher)
• python312Packages.netgen-mesher

---

aarch64-linux

✅ 2 packages built:

• netgen (python313Packages.netgen-mesher)
• python312Packages.netgen-mesher

---

x86_64-darwin (sandbox = true)

✅ 2 packages built:

• netgen (python313Packages.netgen-mesher)
• python312Packages.netgen-mesher

---

aarch64-darwin (sandbox = true)

✅ 2 packages built:

• netgen (python313Packages.netgen-mesher)
• python312Packages.netgen-mesher

[NickCao]

Why do we have to vendor the patch? We can just leave the pr open indefinitely.

[qbisi]

Why do we have to vendor the patch? We can just leave the pr open indefinitely.

I will rebase the pr on master, it no longer apply to v6.2.2506.

[qbisi]

The patch https://github.com/NGSolve/netgen/pull/197/commits/1d93dfba00f224787cfc2cde1af2ab5d7f5b87f7.patch
does not affect compiling netgen itself but rather downstream ngsolve (ngsolve not in nixpkgs yet).
I would consider this url an unstable link, hence remove this patch and backport to 25.05.

[qbisi]

nixpkgs-review result

Generated using nixpkgs-review-gha

Command: nixpkgs-review pr 449532
Commit: 597c2c6fa5646d18b4ce4f7e0ffa7a6f75141e82 (subsequent changes)
Merge: 301a6974254a2c8f6eaee8a072633894182bda4a

Logs: https://github.com/qbisi/nixpkgs-review-gha/actions/runs/18416725905

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x86_64-linux

✅ 2 packages built:

• netgen (python313Packages.netgen-mesher)
• python312Packages.netgen-mesher

---

aarch64-linux

✅ 2 packages built:

• netgen (python313Packages.netgen-mesher)
• python312Packages.netgen-mesher

---

x86_64-darwin (sandbox = true)

✅ 2 packages built:

• netgen (python313Packages.netgen-mesher)
• python312Packages.netgen-mesher

---

aarch64-darwin (sandbox = true)

✅ 2 packages built:

• netgen (python313Packages.netgen-mesher)
• python312Packages.netgen-mesher

[nixpkgs-ci]

Successfully created backport PR for release-25.05:

• [Backport release-25.05] netgen: remove unused patch #450794