Drop whitespace and removed env var

compose.yml

@@ -81,7 +81,6 @@ services:
         #- "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLForceHost=true"
         #- "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLHost=${DOMAIN}"
 
-
     configs: &configs
       - source: entrypoint_sh
         target: /usr/local/bin/entrypoint.sh
@@ -112,7 +111,6 @@ services:
       - ES_ENABLED
       - ES_HOST
       - ES_PORT
-      - ES_PREFIX
       - STATSD_ADDR
       - STATSD_NAMESPACE
       - VAPID_PRIVATE_KEY_FILE=/run/secrets/vapid_private_key