Utilities: Use default execpromises parameter to pledge(..)

Author: https://github.com/bgianfo
Commit: af3751e4dd
Pull-request: https://github.com/SerenityOS/serenity/pull/13496
Reviewed-by: https://github.com/awesomekling ✅

Userland/Utilities/clear.cpp

@@ -10,7 +10,7 @@
 
 ErrorOr<int> serenity_main(Main::Arguments)
 {
-    TRY(Core::System::pledge("stdio", nullptr));
+    TRY(Core::System::pledge("stdio"));
     printf("\033[3J\033[H\033[2J");
     fflush(stdout);
     return 0;