chore: remove DCO check from CI

Not an LF AI & Data member — DCO sign-off not required.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Deborah Jacob <deborah@botanu.ai>

Author: deborahjacob-botanu

.github/workflows/ci.yml

@@ -89,18 +89,3 @@ jobs:
         with:
           name: dist
           path: dist/
-
-  # -------------------------------------------------------------------
-  # DCO sign-off check (required by Linux Foundation)
-  # -------------------------------------------------------------------
-  dco:
-    runs-on: ubuntu-latest
-    if: github.event_name == 'pull_request'
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-      - name: DCO check
-        uses: christophebedard/dco-check@0.5.0
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}