Mem and Regs not part of cpu anymore.

src/backend/Scheduler.cpp

@@ -19,8 +19,7 @@ u64 Scheduler::Remove(const EventType eventType) const {
 }
 
 void Scheduler::Tick(const u64 t) {
-  n64::Core& core = n64::Core::GetInstance();
-  n64::Mem& mem = core.cpu->GetMem();
+  n64::Mem& mem = n64::Core::GetMem();
   ticks += t;
   n64::MI &mi = mem.mmio.mi;
   n64::SI &si = mem.mmio.si;