Taskbar: Tighten pledged promises, remove incorrect comment

Author: https://github.com/bugreport0
Commit: 764f455d21
Pull-request: https://github.com/SerenityOS/serenity/pull/11234
Reviewed-by: https://github.com/alimpfard

Userland/Services/Taskbar/main.cpp

@@ -46,7 +46,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
             ;
     });
 
-    // We need to obtain the WM connection here as well before the pledge shortening.
+    TRY(Core::System::pledge("stdio recvfd sendfd proc exec rpath unix"));
     GUI::WindowManagerServerConnection::the();
 
     TRY(Core::System::pledge("stdio recvfd sendfd proc exec rpath"));