Revert "Change File model to use fillable as opposed to guardable attributes"

This reverts commit abfe156d8d18483f265a264c9769063cbfde8ba2.

modules/system/models/File.php

@@ -20,26 +20,6 @@ class File extends FileBase
      */
     protected $table = 'system_files';
 
-    /**
-     * @var array The attributes that are mass assignable.
-     */
-    protected $fillable = [
-        'file_name',
-        'title',
-        'description',
-        'field',
-        'attachment_id',
-        'attachment_type',
-        'is_public',
-        'sort_order',
-        'data',
-    ];
-
-    /**
-     * @var array The attributes that aren't mass assignable.
-     */
-    protected $guarded = [];
-
     /**
      * {@inheritDoc}
      */