Remove all harmony runtime flags which shipped in M51

src/lookup.h

Index: src/lookup.h
diff --git a/src/lookup.h b/src/lookup.h
index bb65639165ad23324f5cee1668d689c72eb860c8..87821c2b7ef8a09ac111f75b8a69583cd21fa475 100644
--- a/src/lookup.h
+++ b/src/lookup.h
@@ -262,10 +262,9 @@ class LookupIterator final BASE_EMBEDDED {
   inline void UpdateProtector() {
     if (IsElement()) return;
     if (*name_ == heap()->is_concat_spreadable_symbol() ||
-        (FLAG_harmony_species && (*name_ == heap()->constructor_string() ||
-                                  *name_ == heap()->species_symbol())) ||
-        (FLAG_harmony_instanceof &&
-         (*name_ == heap()->has_instance_symbol()))) {
+        *name_ == heap()->constructor_string() ||
+        *name_ == heap()->species_symbol() ||
+        *name_ == heap()->has_instance_symbol()) {
       InternalUpdateProtector();
     }
   }