Delete clang-format files and comments (#14079)

.github/CONTRIBUTING.md

@@ -67,20 +67,6 @@ Contributions are welcome! Here's how you can help:
    might need more work in the future.
 5. It uses protocols and formats which include the required compatibility.
 
-### Important note about automated GitHub checks
-
-When you submit a pull request, GitHub automatically runs checks on the Minetest
-Engine combined with your changes. One of these checks is called 'cpp lint /
-clang format', which checks code formatting. Because formatting for readability
-requires human judgement this check often fails and often makes unsuitable
-formatting requests which make code readability worse.
-
-If this check fails, look at the details to check for any clear mistakes and
-correct those. However, you should not apply everything ClangFormat requests.
-Ignore requests that make code readability worse and any other clearly
-unsuitable requests. Discuss in the pull request with a core developer about how
-to progress.
-
 ## Issues
 
 If you experience an issue, we would like to know the details - especially when

.github/workflows/cpp_lint.yml

@@ -24,23 +24,6 @@ on:
       - '.github/workflows/**.yml'
 
 jobs:
-
-#  clang_format:
-#    runs-on: ubuntu-20.04
-#    steps:
-#      - uses: actions/checkout@v3
-#      - name: Install clang-format
-#        run: |
-#          sudo apt-get update
-#          sudo apt-get install -y clang-format-9
-#
-#      - name: Run clang-format
-#        run: |
-#          source ./util/ci/clang-format.sh
-#          check_format
-#        env:
-#          CLANG_FORMAT: clang-format-9
-
   clang_tidy:
     runs-on: ubuntu-20.04
     steps: