misched: remove forceUnitLatencies. Defaults are handled by the default SchedModel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165417 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/ScheduleDAG.h

@@ -575,11 +575,6 @@ namespace llvm {
     ///
     virtual void computeLatency(SUnit *SU) = 0;
 
-    /// ForceUnitLatencies - Return true if all scheduling edges should be given
-    /// a latency value of one.  The default is to return false; schedulers may
-    /// override this as needed.
-    virtual bool forceUnitLatencies() const { return false; }
-
   private:
     // Return the MCInstrDesc of this SDNode or NULL.
     const MCInstrDesc *getNodeDesc(const SDNode *Node) const;