8365572: Shenandoah: Remove unused thread local _paced_time field

Reviewed-by: shade

Author: William Kemper

src/hotspot/share/gc/shenandoah/shenandoahThreadLocalData.cpp

@@ -37,7 +37,6 @@ ShenandoahThreadLocalData::ShenandoahThreadLocalData() :
   _card_table(nullptr),
   _gclab(nullptr),
   _gclab_size(0),
-  _paced_time(0),
   _plab(nullptr),
   _plab_desired_size(0),
   _plab_actual_size(0),

src/hotspot/share/gc/shenandoah/shenandoahThreadLocalData.hpp

@@ -58,8 +58,6 @@ class ShenandoahThreadLocalData {
   PLAB* _gclab;
   size_t _gclab_size;
 
-  double _paced_time;
-
   // Thread-local allocation buffer only used in generational mode.
   // Used both by mutator threads and by GC worker threads
   // for evacuations within the old generation and
@@ -237,18 +235,6 @@ class ShenandoahThreadLocalData {
     return data(thread)->_plab_actual_size;
   }
 
-  static void add_paced_time(Thread* thread, double v) {
-    data(thread)->_paced_time += v;
-  }
-
-  static double paced_time(Thread* thread) {
-    return data(thread)->_paced_time;
-  }
-
-  static void reset_paced_time(Thread* thread) {
-    data(thread)->_paced_time = 0;
-  }
-
   // Evacuation OOM handling
   static bool is_oom_during_evac(Thread* thread) {
     return data(thread)->_oom_during_evac;