remove linux tray, since pkexec can not work under run_as env

src/core_main.rs

@@ -172,15 +172,6 @@ pub fn core_main() -> Option<Vec<String>> {
             log::info!("start --server with user {}", crate::username());
             #[cfg(any(target_os = "linux", target_os = "windows"))]
             {
-                #[cfg(target_os = "linux")]
-                std::thread::spawn(move || {
-                    std::thread::sleep(std::time::Duration::from_secs(3));
-                    if crate::platform::is_root() {
-                        hbb_common::allow_err!(crate::platform::run_as_user(vec!["--tray"], None));
-                    } else {
-                        hbb_common::allow_err!(crate::run_me(vec!["--tray"]));
-                    }
-                });
                 crate::start_server(true);
                 return None;
             }

src/ui_interface.rs

@@ -284,7 +284,6 @@ pub fn set_option(key: String, value: String) {
                 if value == "Y" {
                     if crate::platform::uninstall_service(true) {
                         std::process::exit(0);
-                        return;
                     }
                 } else {
                     if crate::platform::install_service() {