fix(ci): remove npm commands from build-zip.yml

- Eliminated the `npm install` and `npm build` commands from the 'Build plugin' step to streamline the workflow.

.github/workflows/build-zip.yml

@@ -12,11 +12,9 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v4
 
-    - name: Build plugin # Remove or modify this step as needed
+    - name: Build plugin # modify this step as needed
       run: |
         composer install --no-dev
-        npm install
-        npm run build
 
     - name: Generate zip
       uses: 10up/action-wordpress-plugin-build-zip@stable