remove unnecessary input

.github/workflows/ci-app-prod.yml

@@ -13,7 +13,6 @@ jobs:
     uses: weseek/growi/.github/workflows/reusable-app-prod.yml@master
     with:
       node-version: 14.x
-      npx-command: npx
       skip-cypress: true
     secrets:
       SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}