RFR (XS) 8242228: Shenandoah: remove unused ShenandoahCollectionSet methods

[Aleksey Shipilev]

RFE:
  https://bugs.openjdk.java.net/browse/JDK-8242228

Fix:

diff -r 5461ecb40ab4 src/hotspot/share/gc/shenandoah/shenandoahCollectionSet.cpp
--- a/src/hotspot/share/gc/shenandoah/shenandoahCollectionSet.cpp       Mon Apr 06 18:39:02 2020 +0200
+++ b/src/hotspot/share/gc/shenandoah/shenandoahCollectionSet.cpp       Mon Apr 06 18:44:12 2020 +0200
@@ -94,21 +94,4 @@
 }

-bool ShenandoahCollectionSet::add_region_check_for_duplicates(ShenandoahHeapRegion* r) {
-  if (!is_in(r)) {
-    add_region(r);
-    return true;
-  } else {
-    return false;
-  }
-}
-
-void ShenandoahCollectionSet::remove_region(ShenandoahHeapRegion* r) {
-  assert(ShenandoahSafepoint::is_at_shenandoah_safepoint(), "Must be at a safepoint");
-  assert(Thread::current()->is_VM_thread(), "Must be VMThread");
-  assert(is_in(r), "Not in collection set");
-  _cset_map[r->index()] = 0;
-  _region_count --;
-}
-
 void ShenandoahCollectionSet::clear() {
   assert(ShenandoahSafepoint::is_at_shenandoah_safepoint(), "Must be at a safepoint");
diff -r 5461ecb40ab4 src/hotspot/share/gc/shenandoah/shenandoahCollectionSet.hpp
--- a/src/hotspot/share/gc/shenandoah/shenandoahCollectionSet.hpp       Mon Apr 06 18:39:02 2020 +0200
+++ b/src/hotspot/share/gc/shenandoah/shenandoahCollectionSet.hpp       Mon Apr 06 18:44:12 2020 +0200
@@ -57,8 +57,4 @@
   // Add region to collection set
   void add_region(ShenandoahHeapRegion* r);
-  bool add_region_check_for_duplicates(ShenandoahHeapRegion* r);
-
-  // Remove region from collection set
-  void remove_region(ShenandoahHeapRegion* r);

   // MT version

Testing: hotspot_gc_shenandoah

-- 
Thanks,
-Aleksey