Revert "[test] add CI workflow with Rust checks, cache setup, and auditing; update docs and README with CI details"

This reverts commit 94c816acdf.

.github/workflows/ci.yml

@@ -1,45 +0,0 @@
-name: CI
-
-on:
-  push:
-    branches: [ main, master ]
-  pull_request:
-    branches: [ main, master ]
-
-permissions:
-  contents: read
-
-jobs:
-  ci:
-    name: ci
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup Rust
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          components: clippy, rustfmt
-      - name: Show rustc/cargo versions
-        run: |
-          rustc -Vv
-          cargo -Vv
-      - name: Cache cargo registry
-        uses: actions/cache@v4
-        with:
-          path: |
-            ~/.cargo/registry
-            ~/.cargo/git
-            target
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-      - name: Install cargo-audit
-        run: |
-          cargo install cargo-audit --locked || cargo install cargo-audit
-      - name: Format check
-        run: cargo fmt --all -- --check
-      - name: Clippy (warnings as errors)
-        run: cargo clippy --all-targets -- -D warnings
-      - name: Test
-        run: cargo test --all
-      - name: Audit
-        run: cargo audit

README.md

@@ -77,7 +77,7 @@ Troubleshooting & docs
 - docs/ci.md – minimal CI checklist and job outline
 - CONTRIBUTING.md – PR checklist and workflow
 
-CI status: [CI workflow runs](actions/workflows/ci.yml)
+CI status: [CI badge placeholder]
 
 Examples
 See the examples/ directory for copy-paste scripts:

docs/ci.md

@@ -28,4 +28,3 @@ Example GitHub Actions job (outline)
 Notes
 - For GPU features, set up appropriate runners and add `--features gpu-cuda|gpu-hip|gpu-vulkan` where applicable.
 - For docs-only changes, jobs still build/test to ensure doctests and examples compile when enabled.
-- Mark the CI job named `ci` as a required status check for the default branch in repository branch protection settings.