Removed duplicated link entry (laravel#7750)

Co-authored-by: david-adao-diamond <[email protected]>

Author: drradao

routing.md

@@ -414,7 +414,6 @@ Typically, implicit model binding will not retrieve models that have been [soft
         return $user->email;
     })->withTrashed();
 
-<a name="customizing-the-key"></a>
 <a name="customizing-the-default-key-name"></a>
 #### Customizing The Key