8316295: Serial: Remove empty Generation::promotion_failure_occurred

Reviewed-by: tschatzl

Author: albertnetymk

src/hotspot/share/gc/serial/defNewGeneration.cpp

@@ -846,8 +846,6 @@ void DefNewGeneration::collect(bool   full,
     from()->set_next_compaction_space(to());
     heap->set_incremental_collection_failed();
 
-    // Inform the next generation that a promotion failure occurred.
-    _old_gen->promotion_failure_occurred();
     _gc_tracer->report_promotion_failed(_promotion_failed_info);
 
     // Reset the PromotionFailureALot counters.

src/hotspot/share/gc/shared/generation.hpp

@@ -142,12 +142,6 @@ class Generation: public CHeapObj<mtGC> {
   // might be attempted in the worst case.
   virtual bool promotion_attempt_is_safe(size_t max_promotion_in_bytes) const;
 
-  // For a non-young generation, this interface can be used to inform a
-  // generation that a promotion attempt into that generation failed.
-  // Typically used to enable diagnostic output for post-mortem analysis,
-  // but other uses of the interface are not ruled out.
-  virtual void promotion_failure_occurred() { /* does nothing */ }
-
   // Return an estimate of the maximum allocation that could be performed
   // in the generation without triggering any collection or expansion
   // activity.  It is "unsafe" because no locks are taken; the result