Utilities: Remove unused header includes

Author: https://github.com/bgianfo
Commit: 219d4ba376
Pull-request: https://github.com/SerenityOS/serenity/pull/9120
Reviewed-by: https://github.com/AtkinsSJ ✅

Userland/Utilities/ln.cpp

@@ -6,9 +6,7 @@
 
 #include <AK/LexicalPath.h>
 #include <LibCore/ArgsParser.h>
-#include <errno.h>
 #include <stdio.h>
-#include <stdlib.h>
 #include <unistd.h>
 
 int main(int argc, char** argv)