chore: remove NPM credentials from workflow

Removed NPM credentials from the reset gh-pages workflow.

Author: ilhan007

.github/workflows/reset-gh-pages.yaml

@@ -15,9 +15,6 @@ jobs:
 
     - name: Reset gh-pages git history
       env:
-        NPM_USERNAME: ${{ secrets.NPM_USER }}
-        NPM_EMAIL: ${{ secrets.NPM_EMAIL }}
-        NPM_AUTH_TOKEN: ${{ secrets.NPM_RELEASE_AUTH_TOKEN }}
         GH_TOKEN: ${{ secrets.UI5_WEBCOMP_BOT_GH_TOKEN }}
       run: |
         git config user.name "${{ secrets.UI5_WEBCOMP_BOT_NAME }}"