Remove comparison operator and helper function from AstRawString interface

src/modules.cc

Index: src/modules.cc
diff --git a/src/modules.cc b/src/modules.cc
index 267c398c472c74ac035c7880fa04d9773762a5dd..863443e627fbb670694d3a3c67415ad4a1ac8393 100644
--- a/src/modules.cc
+++ b/src/modules.cc
@@ -20,8 +20,9 @@ void ModuleDescriptor::AddLocalExport(const AstRawString* export_name,
   ZoneAllocationPolicy allocator(zone);
 
   if (exports_ == nullptr) {
-    exports_ = new (zone->New(sizeof(ZoneHashMap))) ZoneHashMap(
-        AstRawString::Compare, ZoneHashMap::kDefaultHashMapCapacity, allocator);
+    exports_ = new (zone->New(sizeof(ZoneHashMap)))
+        ZoneHashMap(ZoneHashMap::PointersMatch,
+                    ZoneHashMap::kDefaultHashMapCapacity, allocator);
   }
 
   ZoneHashMap::Entry* p =