simplify filesystem default config

config/filesystems.php

@@ -48,18 +48,10 @@ return [
             'root' => storage_path('app'),
         ],
 
-        'ftp' => [
-            'driver'   => 'ftp',
-            'host'     => 'ftp.example.com',
-            'username' => 'your-username',
-            'password' => 'your-password',
-
-            // Optional FTP Settings...
-            // 'port'     => 21,
-            // 'root'     => '',
-            // 'passive'  => true,
-            // 'ssl'      => true,
-            // 'timeout'  => 30,
+        'public' => [
+            'driver' => 'local',
+            'root' => storage_path('app/public'),
+            'visibility' => 'public',
         ],
 
         's3' => [
@@ -70,16 +62,6 @@ return [
             'bucket' => 'your-bucket',
         ],
 
-        'rackspace' => [
-            'driver'    => 'rackspace',
-            'username'  => 'your-username',
-            'key'       => 'your-key',
-            'container' => 'your-container',
-            'endpoint'  => 'https://identity.api.rackspacecloud.com/v2.0/',
-            'region'    => 'IAD',
-            'url_type'  => 'publicURL',
-        ],
-
     ],
 
 ];