8253220: Epsilon: clean up unused code/declarations

Reviewed-by: tschatzl

Author: shipilev

src/hotspot/share/gc/epsilon/epsilonBarrierSet.cpp

@@ -41,7 +41,7 @@ EpsilonBarrierSet::EpsilonBarrierSet() : BarrierSet(
           make_barrier_set_c1<BarrierSetC1>(),
           make_barrier_set_c2<BarrierSetC2>(),
           NULL /* barrier_set_nmethod */,
-          BarrierSet::FakeRtti(BarrierSet::EpsilonBarrierSet)) {};
+          BarrierSet::FakeRtti(BarrierSet::EpsilonBarrierSet)) {}
 
 void EpsilonBarrierSet::on_thread_create(Thread *thread) {
   EpsilonThreadLocalData::create(thread);

src/hotspot/share/gc/epsilon/epsilonHeap.cpp

@@ -46,7 +46,6 @@ jint EpsilonHeap::initialize() {
   _virtual_space.initialize(heap_rs, init_byte_size);
 
   MemRegion committed_region((HeapWord*)_virtual_space.low(),          (HeapWord*)_virtual_space.high());
-  MemRegion  reserved_region((HeapWord*)_virtual_space.low_boundary(), (HeapWord*)_virtual_space.high_boundary());
 
   initialize_reserved_region(heap_rs);