--- a/js/src/gc/GC.cpp
+++ b/js/src/gc/GC.cpp
@@ -2610,31 +2610,30 @@ struct ArenasToUpdate {
 
  private:
   AllocKinds kinds;  // Selects which thing kinds to update
   Zone* zone;        // Zone to process
   AllocKind kind;    // Current alloc kind to process
   Arena* arena;      // Next arena to process
 
   AllocKind nextAllocKind(AllocKind i) { return AllocKind(uint8_t(i) + 1); }
-  bool shouldProcessKind(AllocKind kind);
   Arena* next(AutoLockHelperThreadState& lock);
 };
 
 ArenasToUpdate::ArenasToUpdate(Zone* zone, AllocKinds kinds)
     : kinds(kinds), zone(zone), kind(AllocKind::FIRST), arena(nullptr) {
   MOZ_ASSERT(zone->isGCCompacting());
 }
 
 Arena* ArenasToUpdate::next(AutoLockHelperThreadState& lock) {
   // Find the next arena to update.
   //
-  // This iterates through the GC thing kinds filtered by shouldProcessKind(),
-  // and then through thea arenas of that kind.  All state is held in the
-  // object and we just return when we find an arena.
+  // This iterates through the GC thing kinds and then through the arenas of
+  // that kind.  All state is held in the object and we just return when we find
+  // an arena.
 
   for (; kind < AllocKind::LIMIT; kind = nextAllocKind(kind)) {
     if (kinds.contains(kind)) {
       if (!arena) {
         arena = zone->arenas.getFirstArena(kind);
       } else {
         arena = arena->next;
       }