Drop semver CI for now

Author: jrmuizel

.github/workflows/rust.yml

@@ -20,9 +20,3 @@ jobs:
       run: cargo build --verbose
     - name: Run tests
       run: cargo test --all-features --verbose
-  semver:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-    - name: Check semver
-      uses: obi1kenobi/cargo-semver-checks-action@v2