github actions: move pgp key to daily builds

.github/workflows/release.yaml

@@ -15,19 +15,6 @@ env:
   GO_VERSION: 1.23.12
 
 jobs:
-  ########################
-  # Check release signing keys
-  ########################
-  pgp-key-expiration-check:
-    name: Check release signing key expirations
-    runs-on: ubuntu-latest
-    steps:
-      - name: Git checkout
-        uses: actions/checkout@v4
-
-      - name: Check PGP key expirations
-        run: scripts/check-pgp-expiry.sh
-
   ########################
   # Create release
   ########################