[cleanup] add missing #undef SCANNER_ACCESSORS to parser-base.h

src/parsing/parser-base.h

Index: src/parsing/parser-base.h
diff --git a/src/parsing/parser-base.h b/src/parsing/parser-base.h
index ef492e0c01ad1df71767b8bbf06334d7f9ee2900..a2861abf60c59882664a5d91d8189cbcd246ab29 100644
--- a/src/parsing/parser-base.h
+++ b/src/parsing/parser-base.h
@@ -138,6 +138,8 @@ class ParserBase : public Traits {
   ALLOW_ACCESSORS(harmony_function_name);
   ALLOW_ACCESSORS(harmony_function_sent);
   SCANNER_ACCESSORS(harmony_exponentiation_operator);
+
+#undef SCANNER_ACCESSORS
 #undef ALLOW_ACCESSORS
 
   uintptr_t stack_limit() const { return stack_limit_; }