caddy: Fix disable inactive site/config logic

This was copied from the webserver role, however here we don’t have a `.conf`
file suffix.

caddy/tasks/main.yml

@@ -116,8 +116,6 @@
     {{ current_active_sites.files
        | map(attribute='path')
        | map('basename')
-       | map('splitext')
-       | map('first')
        | difference(wanted_active_sites)
     }}
   loop_control:
@@ -149,8 +147,6 @@
     {{ current_active_config.files
        | map(attribute='path')
        | map('basename')
-       | map('splitext')
-       | map('first')
        | difference(wanted_active_config)
     }}
   loop_control: