removed broken envvars

.forgejo/workflows/container-build.yml

@@ -7,12 +7,9 @@ jobs:
       image: quay.io/keycloak/keycloak:latest
       env:
         PATH: "/opt/keycloak/bin:/usr/bin:/usr/local/bin"
-        KC_HEALTH_ENABLED: false
         KC_DB: postgres
-        KC_CACHE_STACK: tcp
         KC_HTTPS_CLIENT_AUTH: request
         KC_FEATURES: recovery-codes,passkeys,opentelemetry
-        KC_DB_URL: postgresql://postgres.services.tobie:5432/keycloak
     steps:
       - run: kc.sh build
         working-directory: /opt/keycloak/