AK: Remove kfree definition

Author: https://github.com/mhermier
Commit: cb3cc6ec27
Pull-request: https://github.com/SerenityOS/serenity/pull/11827
Reviewed-by: https://github.com/BertalanD
Reviewed-by: https://github.com/bgianfo ✅

AK/Demangle.h

@@ -20,7 +20,7 @@ inline String demangle(StringView name)
     auto* demangled_name = abi::__cxa_demangle(name.to_string().characters(), nullptr, nullptr, &status);
     auto string = String(status == 0 ? demangled_name : name);
     if (status == 0)
-        kfree(demangled_name);
+        free(demangled_name);
     return string;
 }