remove unnecessary files

packages/app/src/utils/logger/stream.dev.js

@@ -1,16 +0,0 @@
-const isBrowser = typeof window !== 'undefined';
-
-let stream;
-
-// browser settings
-if (isBrowser) {
-  const ConsoleFormattedStream = require('@browser-bunyan/console-formatted-stream').ConsoleFormattedStream;
-  stream = new ConsoleFormattedStream();
-}
-// node settings
-else {
-  const bunyanFormat = require('bunyan-format');
-  stream = bunyanFormat({ outputMode: 'short' });
-}
-
-module.exports = stream;

packages/app/src/utils/logger/stream.prod.js

@@ -1,25 +0,0 @@
-const { envUtils } = require('growi-commons');
-
-const isBrowser = typeof window !== 'undefined';
-
-let stream;
-
-// browser settings
-if (isBrowser) {
-  const ConsoleFormattedStream = require('@browser-bunyan/console-formatted-stream').ConsoleFormattedStream;
-  stream = new ConsoleFormattedStream();
-}
-// node settings
-else {
-  const isFormat = (process.env.FORMAT_NODE_LOG == null) || envUtils.toBoolean(process.env.FORMAT_NODE_LOG);
-
-  if (isFormat) {
-    const bunyanFormat = require('bunyan-format');
-    stream = bunyanFormat({ outputMode: 'long' });
-  }
-  else {
-    stream = process.stdout;
-  }
-}
-
-module.exports = stream;