Actually remove filter on json assets as intended

In laravel#35, the intended change seems to be that JSON files should be included in the assets upload. However, the actual effect of laravel#35 was that *all* JSON files were excluded in the assets upload.

This change removes the filter on JSON asset files entirely.

src/AssetFiles.php

@@ -27,7 +27,6 @@ public static function get($path)
                 ->notName('web.config')
                 ->notName('browserconfig.xml')
                 ->notName('*.webmanifest')
-                ->notName('*.json')
                 ->notName('*.php')
                 ->ignoreVcs(true)
                 ->ignoreDotFiles(true)