remove startup elevation, update impersonate_system

Signed-off-by: 21pages <pages21@163.com>

src/core_main.rs

@@ -85,11 +85,6 @@ pub fn core_main() -> Option<Vec<String>> {
                 .ok();
         }
     }
-    #[cfg(windows)]
-    #[cfg(not(debug_assertions))]
-    if !crate::platform::is_installed() && args.is_empty() {
-        crate::platform::elevate_or_run_as_system(is_setup, _is_elevate, _is_run_as_system);
-    }
     if args.is_empty() {
         std::thread::spawn(move || crate::start_server(false));
     } else {