Reduce meaningless intermediate variables. (#56265)

Author: LjjGit

src/Illuminate/Database/Eloquent/Model.php

@@ -737,11 +737,7 @@ public static function on($connection = null)
         // First we will just create a fresh instance of this model, and then we can set the
         // connection on the model so that it is used for the queries we execute, as well
         // as being set on every relation we retrieve without a custom connection name.
-        $instance = new static;
-
-        $instance->setConnection($connection);
-
-        return $instance->newQuery();
+        return (new static)->setConnection($connection)->newQuery();
     }
 
     /**