AK+LibJS: Remove null state from DeprecatedFlyString :^)

Author: https://github.com/DanShaders
Commit: 8ac0e3f0e5
Pull-request: https://github.com/SerenityOS/serenity/pull/22926
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/davidot ✅

Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp

@@ -1261,7 +1261,6 @@ Completion ECMAScriptFunctionObject::ordinary_call_evaluate_body()
 
 void ECMAScriptFunctionObject::set_name(DeprecatedFlyString const& name)
 {
-    VERIFY(!name.is_null());
     auto& vm = this->vm();
     m_name = name;
     m_name_string = PrimitiveString::create(vm, m_name);