Remove duplicate log

Also confirmed that #1750 is fixed.

src/node/cli.ts

@@ -348,7 +348,9 @@ export async function readConfigFile(configPath?: string): Promise<Args> {
     logger.info(`Wrote default config file to ${humanPath(configPath)}`)
   }
 
-  logger.info(`Using config file ${humanPath(configPath)}`)
+  if (!process.env.CODE_SERVER_PARENT_PID) {
+    logger.info(`Using config file ${humanPath(configPath)}`)
+  }
 
   const configFile = await fs.readFile(configPath)
   const config = yaml.safeLoad(configFile.toString(), {