Can't remove bullets from flags

Hello,
I’m trying to remove bullets from flags but the code you provided doesn’t work in the CSS.
(The code for aligning flags horizontally works, for example)
The language switcher is located in the sidebar, and each element in the sidebar has bullets (imported from an image in the folder).
I tried writing !important in the lang.item code but obtained nothing.

I hope you can help me!
Thanks

https://ww.wp.xz.cn/plugins/polylang/