Remove code_execution extra from CI workflow

The code_execution extra was removed from pyproject.toml since backend
SDKs are now managed by bespokelabs-sandbox's own extras.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: madiator

.github/workflows/lint-and-test.yaml

@@ -43,7 +43,7 @@ jobs:
       - name: Install dependencies
         run: |
           pip install poetry
-          poetry install --with dev --extras "vllm code_execution"
+          poetry install --with dev --extras "vllm"
 
       - name: Run ruff
         run: |