Delete cpp-linter.yml

Linter was not that useful, so removing it.

.github/workflows/cpp-linter.yml

@@ -1,38 +0,0 @@
-name: cpp-linter
-permissions: read-all
-
-on:
-  pull_request:
-    branches:
-      - master
-    paths-ignore: "tests/**"
-
-jobs:
-  cpp-linter:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: cmake
-        run: CXX=clang++-12 cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release .
-      - uses: shenxianpeng/cpp-linter-action@master
-        id: linter
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          version: 12
-          style: file
-          lines-changed-only: true
-          tidy-checks: >-
-            bugprone-*,
-            performance-*,
-            readability-*,
-            portability-*,
-            modernize-*,
-            clang-analyzer-*,
-            cppcoreguidelines-*,
-            -modernize-use-trailing-return-type
-
-      - name: Check Result
-        if: steps.linter.outputs.checks-failed > 0
-        run: |
-          echo "Failed linting."