Remove incorrect is_gc_operation call after rebase

Author: JonasNorlinder

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

@@ -96,8 +96,6 @@ class VM_Heap_Sync_Operation : public VM_Operation {
   virtual bool doit_prologue();
   // Releases the Heap_lock.
   virtual void doit_epilogue();
-
-  bool is_gc_operation() const { return true; }
 };
 
 class VM_Verify : public VM_Heap_Sync_Operation {

src/hotspot/share/runtime/vmOperation.hpp

@@ -172,8 +172,6 @@ class VM_Operation : public StackObj {
   // or concurrently with Java threads running.
   virtual bool evaluate_at_safepoint() const { return true; }
 
-  virtual bool is_gc_operation() const { return false; }
-
   // Debugging
   virtual void print_on_error(outputStream* st) const;
   virtual const char* name() const  { return _names[type()]; }