simplify disk change

Author: taylorotwell

src/Illuminate/Log/LogManager.php

@@ -69,6 +69,8 @@ public function __construct($app)
      */
     public function build(array $config)
     {
+        unset($this->channels['ondemand']);
+
         return $this->get('ondemand', $config);
     }
 
@@ -127,10 +129,6 @@ public function getChannels()
     protected function get($name, ?array $config = null)
     {
         try {
-            if ($name === 'ondemand' && ! empty($config)) {
-                unset($this->channels['ondemand']);
-            }
-
             return $this->channels[$name] ?? with($this->resolve($name, $config), function ($logger) use ($name) {
                 return $this->channels[$name] = $this->tap($name, new Logger($logger, $this->app['events']));
             });