config: remove LOGGER_ENABLE option

LOGGER_LEVEL has 'silent' which disable a log.
Having LOGGER_ENABLE is redundant.

PR-URL: #46

README.md

@@ -72,7 +72,6 @@ PORT_DEV=<port number> # browser-sync listeing port; default is 3000
 At `env` section in `process.yml` are environment variables that will override `.env.json` for running in production environment.
 
 ### Environment Variables
-- LOGGER_ENABLE: if `true` enables log, `false` disables log
 - LOGGER_LEVEL: select a [logging level](https://github.com/pinojs/pino/blob/master/docs/API.md#level)
 - LOGGER_PRETTY: pretty print log (should be set to `false` in production)
 - PORT: application port

process.yml

@@ -10,7 +10,6 @@ apps:
      pid_file: ./log/modcolle.pid
 
      env:
-      LOGGER_ENABLE: true
       LOGGER_PRETTY: true
       LOGGER_LEVEL: info
       PORT: 5000

src/logger.js

@@ -11,7 +11,6 @@ const loggers = {}
 labels.forEach(label => {
   loggers[label] = pino({
     name: label,
-    enabled: LOGGER_ENABLE === 'true',
     level: LOGGER_LEVEL,
     prettyPrint: LOGGER_PRETTY === 'true'
   })