ci: @vscode/vsce is added into package.json, no need to install at pipeline

Author: Francisco Moreno Cantero

.github/workflows/publish.yml

@@ -14,7 +14,6 @@ jobs:
       with:
         node-version: 18.x
     - run: npm install
-    - run: npm install @vscode/vsce
     - name: Publish
       if: success() && startsWith(github.ref, 'refs/tags/')
       run: npm run deploy