--- a/src/hotspot/share/gc/g1/g1StringDedup.hpp	Tue Jan 29 10:13:23 2019 +0100
+++ b/src/hotspot/share/gc/g1/g1StringDedup.hpp	Tue Jan 29 11:30:17 2019 +0100
@@ -78,35 +78,6 @@
   static void enqueue_from_mark(oop java_string, uint worker_id);
   static void enqueue_from_evacuation(bool from_young, bool to_young,
                                       unsigned int queue, oop java_string);
-
-  static void oops_do(OopClosure* keep_alive);
-  static void parallel_unlink(G1StringDedupUnlinkOrOopsDoClosure* unlink, uint worker_id);
-  static void unlink_or_oops_do(BoolObjectClosure* is_alive, OopClosure* keep_alive,
-                                bool allow_resize_and_rehash, G1GCPhaseTimes* phase_times = NULL);
-};
-
-//
-// This closure encapsulates the state and the closures needed when scanning
-// the deduplication queue and table during the unlink_or_oops_do() operation.
-// A single instance of this closure is created and then shared by all worker
-// threads participating in the scan.
-//
-class G1StringDedupUnlinkOrOopsDoClosure : public StringDedupUnlinkOrOopsDoClosure {
-public:
-  G1StringDedupUnlinkOrOopsDoClosure(BoolObjectClosure* is_alive,
-                                     OopClosure* keep_alive,
-                                     bool allow_resize_and_rehash) :
-    StringDedupUnlinkOrOopsDoClosure(is_alive, keep_alive) {
-      if (G1StringDedup::is_enabled()) {
-        G1StringDedup::gc_prologue(allow_resize_and_rehash);
-      }
-    }
-
-  ~G1StringDedupUnlinkOrOopsDoClosure() {
-    if (G1StringDedup::is_enabled()) {
-      G1StringDedup::gc_epilogue();
-    }
-  }
 };
 
 #endif // SHARE_GC_G1_G1STRINGDEDUP_HPP