LibJS+LibWeb: Remove remaining use and reference to SafeFunction

Author: https://github.com/shannonbooth
Commit: 797b0d0f43
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2062
Reviewed-by: https://github.com/kalenikaliaksandr ✅

Meta/check-style.py

@@ -23,7 +23,6 @@ GOOD_LICENSE_HEADER_PATTERN = re.compile(
 LICENSE_HEADER_CHECK_EXCLUDES = {
     'AK/Checked.h',
     'AK/Function.h',
-    'Userland/Libraries/LibJS/SafeFunction.h',
 }
 
 # We check that "#pragma once" is present