chore: remove conventional commit check for PR (#950)

This removes conventional commit check for PRs.

Since we use the PR title and description this is useless. It fails a
lot of time and we ignore it.

IMPORTANT NOTE: This does **not** mean Ratatui abandons conventional
commits. This only relates to commits in PRs.

.github/workflows/ci.yml

@@ -29,13 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        if: github.event_name != 'pull_request'
         uses: actions/checkout@v4
-      - name: Checkout
-        if: github.event_name == 'pull_request'
-        uses: actions/checkout@v4
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
       - name: Install Rust nightly
         uses: dtolnay/rust-toolchain@nightly
         with:
@@ -48,11 +42,6 @@ jobs:
         run: cargo make lint-format
       - name: Check documentation
         run: cargo make lint-docs
-      - name: Check conventional commits
-        uses: crate-ci/committed@master
-        with:
-          args: "-vv"
-          commits: HEAD
       - name: Check typos
         uses: crate-ci/typos@master
       - name: Lint dependencies