[CodeGen][MachineScheduler] Remove the unimplemented print method.

Author: cdevadas

llvm/lib/CodeGen/MachineScheduler.cpp

@@ -222,8 +222,6 @@ class MachineSchedulerBase : public MachineSchedContext,
 public:
   MachineSchedulerBase(char &ID): MachineFunctionPass(ID) {}
 
-  void print(raw_ostream &O, const Module* = nullptr) const override;
-
 protected:
   void scheduleRegions(ScheduleDAGInstrs &Scheduler, bool FixKillFlags);
 };
@@ -666,10 +664,6 @@ void MachineSchedulerBase::scheduleRegions(ScheduleDAGInstrs &Scheduler,
   Scheduler.finalizeSchedule();
 }
 
-void MachineSchedulerBase::print(raw_ostream &O, const Module* m) const {
-  // unimplemented
-}
-
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
 LLVM_DUMP_METHOD void ReadyQueue::dump() const {
   dbgs() << "Queue " << Name << ": ";