Fix importmap

Author: smnandre

ux.symfony.com/importmap.php

@@ -56,9 +56,6 @@
     '@symfony/ux-live-component' => [
         'path' => './vendor/symfony/ux-live-component/assets/dist/live_controller.js',
     ],
-    '@symfony/ux-leaflet-map' => [
-        'path' => './vendor/symfony/ux-leaflet-map/assets/dist/map_controller.js',
-    ],
     'bootstrap' => [
         'version' => '5.3.3',
     ],