Refact: Remove unused code to avoid confusion.

Signed-off-by: fufesou <linlong1266@gmail.com>

src/config.rs

@@ -90,15 +90,12 @@ pub const LINK_DOCS_HOME: &str = "https://rustdesk.com/docs/en/";
 pub const LINK_DOCS_X11_REQUIRED: &str = "https://rustdesk.com/docs/en/manual/linux/#x11-required";
 pub const LINK_HEADLESS_LINUX_SUPPORT: &str =
     "https://github.com/rustdesk/rustdesk/wiki/Headless-Linux-Support";
-pub const LINK_KDE_PLASMA_WAYLAND_SELECT_ALL_DISPLAYS: &str =
-    "https://github.com/rustdesk/rustdesk/discussions/13468";
 
 lazy_static::lazy_static! {
     pub static ref HELPER_URL: HashMap<&'static str, &'static str> = HashMap::from([
         ("rustdesk docs home", LINK_DOCS_HOME),
         ("rustdesk docs x11-required", LINK_DOCS_X11_REQUIRED),
         ("rustdesk x11 headless", LINK_HEADLESS_LINUX_SUPPORT),
-        ("rustdesk discussion Plasma Wayland all displays", LINK_KDE_PLASMA_WAYLAND_SELECT_ALL_DISPLAYS),
         ]);
 }