Revert "Sign the next snapshot just for testing (#6597)" (#6598)

This reverts commit a37c682.

Author: martinbonnin

.github/workflows/push.yml

@@ -29,8 +29,6 @@ jobs:
         env:
           LIBRARIAN_SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
           LIBRARIAN_SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
-          GPG_PRIVATE_KEY: ${{ secrets.SONATYPE_GPG_KEY }}
-          GPG_PRIVATE_KEY_PASSWORD: ${{ secrets.SONATYPE_GPG_KEY_PASSWORD }}
       - name: Collect Diagnostics
         if: always()
         run: ./scripts/collect-diagnostics.main.kts