Remove unused viewer resource type

Author: manisandro

src/templates/resources/form.html

@@ -31,7 +31,6 @@
         wfs_layer_update: ['wfs_service'],
         wfs_layer_delete: ['wfs_service'],
         tileset3d: ['map'],
-        viewer: [],
         viewer_task: [],
         theme_info_link: [],
         plugin: [],